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高中三年级英语

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  • 改错题
    短文改错。
    对标有题号的每一行做出判断:如无错误,在该行右边横线上划一个勾(√),如果有错误
    (每行只有一个错误),则按下列情况改正:
    该行多一个词:把多余的词用斜线()划掉,在该行右边横线上写出该词,并也用斜线划掉。
    该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。
    该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。
     Dear Amy,                                                    
            I have a problem and I'm writing ask you                      
    for an advice. This is a secret, so don't tell anybody else.  
    My cousin and I used to getting along very well and          
    we were good friend. We were planning to spend                
    part of the winter holiday together, so now                
    I don't think I want to invite her home.                      
    Recently I has discovered that he's started to tell        
    lies. When I told him this was wrong to tell lies,            
    but he just laughed at me. The problem is, "Should I        
    tell his parents or his teacher, or should I keep quietly?"  

    1. _________           
    2. _________        
    3. _________         
    4. _________         
    5. _________         
    6. _________         
    7. _________                                                   
    8. _________          
    9. _________       
    10. _________      

    本题信息:2010年0105期中题英语改错题难度较难 来源:张雪
  • 本题答案
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本试题 “短文改错。对标有题号的每一行做出判断:如无错误,在该行右边横线上划一个勾(√),如果有错误(每行只有一个错误),则按下列情况改正:该行多一个词:把多...” 主要考查您对

可数名词及其单复数

不可数名词

人称代词

形容词

介词和介词短语

并列连词

从属连词

助动词

动词短语

it的用法

等考点的理解。关于这些考点您可以点击下面的选项卡查看详细档案。
  • 可数名词及其单复数
  • 不可数名词
  • 人称代词
  • 形容词
  • 介词和介词短语
  • 并列连词
  • 从属连词
  • 助动词
  • 动词短语
  • it的用法

可数名词:

是指能以数目来计算,可以分成个体的人或东西;因此它有复数形式,当它的复数形式在句子中作主语时,句子的谓语也应用复数形式。 
                         


可数名词复数的规则变化: 

情况 构成方法  读音 例词
一般情况 加 –s 1.清辅音后读/s/;
2.浊辅音和元音后读/z/; 
map-maps
bag-bags
car-cars
以s,sh,ch,x等结尾的词 加 -es 读 /iz/ bus-buses
watch-watches
以ce,se,ze,(d)ge等结尾
的词 
加 -s 读 /iz/  license-licenses
以辅音字母+y结尾的词   变y 为i再加es  读 /z/ baby-babies
另外:
1)以y 结尾的专有名词,或元音字母+y结尾的名词变复数时,直接加s变复数: 
如:two Marys the Henrys      monkey---monkeys holiday---holidays  
比较:层楼:storey---storeys  story---stories
2)以o 结尾的名词,变复数时:
a. 加s,如: photo---photos  piano---pianos 
b. 加es,如:potato--potatoes tomato--tomatoes
c. 均可,如:zero---zeros / zeroes 
3)以f或fe 结尾的名词变复数时:
a. 加s,如: belief---beliefs roof---roofs   safe---safes  gulf---gulfs;
b. 去f, fe 加ves,如:half---halves knife---knives leaf---leaves wolf---wolves  wife---wives life---lives thief---thieves;
c. 均可,如:handkerchief:  handkerchiefs / handkerchieves

可数名词复数的不规则变化:

1)child---children foot---feet  tooth---teeth   mouse---mice  man---men woman---women  
注意:与 man 和 woman构成的合成词,其复数形式也是 -men 和-women。 
如:an Englishman,two Englishmen. 但German不是合成词,故复数形式为Germans;Bowman是姓,其复数是the Bowmans。
2)单复同形 如:
deer,sheep,fish,Chinese,Japanese
li,jin,yuan,two li,three mu,four jin 
但除人民币元、角、分外,美元、英镑、法郎等都有复数形式。如:
   a dollar, two dollars;  a meter, two meters
3)集体名词,以单数形式出现,但实为复数。
如:staff  people police cattle 等本身就是复数,不能说a staff  a people,a police,a cattle,
但可以说a person,a policeman,a head of cattle, the English,the British,the French,the Chinese,the
Japanese, the Swiss 等名词,表示国民总称时,作复数用。 
如:The Chinese are industries and brave. 中国人民是勤劳勇敢的。
4)以s 结尾,仍为单数的名词,如:
a. maths,politics,physics等学科名词,为不可数名词,是单数。
b. news 是不可数名词。
c. the United States,the United Nations 应视为单数。
The United Nations was organized in 1945. 联合国是1945年组建起来的。
d. 以复数形式出现的书名,剧名,报纸,杂志名,也可视为单数。
 "The Arabian Nights" is a very interesting story-book.
 <<一千零一夜>>是一本非常有趣的故事书。
5) 表示由两部分构成的东西,如:glasses (眼镜) trousers, clothes ;
若表达具体数目,要借助数量词 pair(对,双); suit(套); a pair of glasses; two pairs of trousers
6)另外还有一些名词,其复数形式有时可表示特别意思,如:goods货物,waters水域,fishes(各种)鱼

复合名词的复数形式:
   名词作定语名词作定语一般用单数,但也有以下例外。
1)用复数作定语。
如:sports meeting 运动会 
students reading-room 学生阅览室  
talks table 谈判桌    
the foreign languages department 外语系
2)man, woman, gentleman等作定语时,其单复数以所修饰的名词的单复数而定。
如:men workers  
women teachers 
gentlemen officials
3)有些原有s结尾的名词,作定语时,s保留。
如:goods train (货车) 
arms produce 武器生产
customs papers 海关文件
clothes brush衣刷
4)数词+名词作定语时,这个名词一般保留单数形式。
如:two-dozen eggs 两打/(二十四个鸡蛋) 
a ten-mile walk 十里路 
two-hundred trees 两百棵树           
a five-year plan 一个五年计划   

可数名词单复数知识体系:

 


不同国籍人的单复数:

国籍 总称(谓语用复数) 单数 复数
中国人 the Chinese a Chinese  two Chinese
瑞士人 the Swiss a Swiss two Swiss
澳大利亚人 the Australians  an Australian two Australians
俄国人 the Russians a Russian two Russians
意大利人 the Italians an Italian two Italians
希腊人 the Greek a Greek two Greeks
法国人 the French a Frenchman two Frenchmen
日本人 the Japanese a Japanese two Japanese
美国人 the Americans an American two Americans
印度人 the Indians an Indian two Indians
加拿大人 the Canadians a Canadian two Canadians
德国人 the Germans a German two Germans
英国人 the English an Englishman two Englishmen
瑞典人 the Swedish a Swede two Swedes


不可数名词的概念:

不可数名词是指不能以数目来计算,不可以分成个体的概念、状态、品质、感情或表示物质材料的东西;它一般没有复数形式,只有单数形式,它的前面不能用不定冠词a / an ,若要表示它的个体意义 时,一般要与一个名词短语连用。
例如: a cup of tea 一杯茶
             a piece of news 一则新闻 
             two pieces of paper 两张纸  


不可数名词量的表示:

1)物质名词:
a. 当物质名词转化为个体名词时。
比较:Cake is a kind of food. 蛋糕是一种食物。(不可数)
            These cakes are sweet. 这些蛋糕很好吃。(可数)
b. 当物质名词表示该物质的种类时,名词可数。
Thisfactoryproducessteel.(不可数)
如:We need various steels. (可数)
c. 当物质名词表示份数时,可数。
如:Our country is famous for tea. 我国因茶叶而闻名。 
        Two teas, please.  请来两杯茶。
2)抽象名词有时也可数。
如:four freedoms 四大自由
        the four modernizations 四个现代化
注:物质名词和抽象名词可以借助单位词表一定的数量。
如:a glass of water 一杯水 
        a piece o fadvice 一条建议


不可数名词用法:

1、不可数名词前不能直接加数词或a(an)。切忌犯以下错误: meat, two tea, 应说a piece of meat, two cups oftea。
2、不可数名词无单复数变化,谓语动词一般用单数形式。
如:There is some milk in the glass. 杯里有一些牛奶。
        Some food on the table goes bad. 桌子上的食物变质了。
3、能修饰不可数名词的词有:much, a little, little, a bit, some, any, a lot of, plenty of等,以此来表示不确定的数量。如:
        much bread 许多面包
        a little milk 一点牛奶
        a lot of work 许多工作
4、表示具体的数量时应用单位词加of结构。
如:I bought two kilos of meat. 我买了两公斤肉。
       He ate three pieces of bread. 他吃了三块面包。
       Would you like a cup of coffee? 你想喝杯咖啡吗?


人称代词的概念:

人称代词是替代我、你、他、她、它、我们、你们、他们、她们、它们等人称的词。
人称代词分为主格和宾格形式,并有人称的单复数形式。按所替代人称的不同分为第一人称、第二人称和第三人称。


人称代词的用法:

人称代词在句中可以用作主语(用主格,如:I,you,he,she,we,they,等)和宾语(用宾格,如 me,you,him,her,us,them等)
如:He loves her, but she hates him. 他爱她,但她却讨厌他。
:(1)在口语中,当人称代词用作表语、用于than, as之后或用于强调句中被强调时,可以用语。 例如:
        "Who is it?" "It's me."“是谁呀?”“是我。”
        He sings better than me. 他比我唱得好。
        He is as tall as her. 他和她一样高。
        It's me who did it. 这是我干的。但是,若than,as后的人称代词后跟有动词,则必须用主格。例如:
        He sings better than I do./ He is as tall as she is.
        (2)单独使用的人称代词通常用宾格。
             "I' m tired.""Me too."“我累了。”“我也累了。”
             "Who wants this?" "Me."“谁要这个?”“我要。”
        (3)有时用主格或宾格会导致意思的变化。
             I like you better than he. 我比他更喜欢你。为 I like you better than he likes you. 之略。
             I like you better than him. 我喜欢你胜过喜欢他。为 I like you better than he likes him. 之略。


人称代词主格、宾格、人称、单复数对比:

人称代词

单数

复数

主格

宾格

主格

宾格

第一人称

I

me

we

us

第二人称

you

you

you

you

第三人称

he

him

they

them

she

her

them

it

it


人称代词的排序:

人称代词的排列顺序为:单数人称代词通常按“二三一”排列,即you, he and I;复数人称代词通常按“一二三”排列,即we, you and they:
You, he and I are of the same age. 你,他和我都是同一年龄。
We, you and they are all good citizens. 我们,你们和他们都是好公民。
但若是用于承担责任或错误等场合,则可把第一人称I置于其他人称代词之前:
I and Tom are to blame. 我和汤姆该受批评。
比较:Tom and I hope to go there. 汤姆和我想去那儿。
注意:you and I 是固定结构,语序通常不宜颠倒。


人称代词知识体系:

 


人称代词用法拓展:

1、在通常情况下,人称代词在句子中出现在它所代替的名词之后,即先出现名词,再出现相应的代词。但是,在书面语中,有时也可出现代词,后出现代词所代替的名词。
As soon as it had hopped off, the plane picked up speed.飞机刚一起飞,就加了速。
(比较:As soon as the plane had hopped off, it picked up speed.)
2、人称代词后跟名词同位语。有些人称代词后有时可跟同位语。
These small desks are forus students.这些小课桌是给我们学生的。
We girls often go to the movies together.我们女孩子常一起去看电影。
He asked you boys to be quiet.他要你们男孩子安静些。


形容词的概念:

形容词(adjective),简称adj.或a,形容词用来修饰名词或代词,表示人或事物的性质、状态,和特征的程度好坏与否,形容词在句中作定语、表语、宾语补足语。通常,可将形容词分成性质形容词和叙述形容词两类,其位置不一定都放在名词前面。


形容词的作用与位置:

形容词是用来修饰名词的,常被放在名词前作定语,或放在系动词后面作表语。以下属几种特殊情况,须牢记;
(1)形容词短语作定语,定语后置。
如:a language difficult to master,
        a leaning tower about 180 feet high
(2)表语形容词(afraid、alike、alone、asleep、awake、alive等)作定语,定语后置。如a man alive。有些表身体健康状况的形容词如well、faint、ill只作表语。sick既可作表语又可作定语,ill如作定语意为“bad”。
(3)用作定语,修饰由不定代词one、no、any、some和every构成的复合词如anything、something等时,通常后置。
如:I have something important to tell you.
(4)else常用作疑问代词和不定代词的后置定语。
(5)enough、nearby修饰名词前置或后置,程度副词一般位于形容词、副词前面,enough修饰形容词、副词时,必须后置。
(6)几个并列的形容词作定语,其语序通常为:限定语(The、A)+描绘性形容词+size(大小)+shape(形状)+age(年龄、时间)+color(颜色)+origin(国籍、来源)+material(材料)+purpose(目的)+名词。

口诀:
限定描绘大长高,形状年龄和新老;颜色国籍跟材料,作用类别往后靠。
如:a heavy black Chinese steel umbrella,
        the man's first tow interesting little red French oil paintings


形容词的用法:

1、形容词修饰名词,说明事物或人的性质或特征。通常,可将形容词分成性质形容词和叙述形容词两类,其位置不一定都放在名词前面:
1)直接说明事物的性质或特征的形容词是性质形容词,它有级的变化,可以用程度副词修饰,在句中可作定语、表语和补语。例如:hot热的。
2)叙述形容词只能作表语,所以又称为表语形容词。这类形容词没有级的变化,也不可用程度副词修饰。
大多数以a开头的形容词都属于这一类。例如:
afraid害怕的。(错)Heisanillman. (对)Themanisill. (错)Sheisanafraidgirl. (对)Thegirlisafraid.
这类词还有:well,unwell,ill,faint,afraid,alike,alive,alone,asleep,awake等。
3)形容词作定语修饰名词时,要放在名词的前边。但是如果形容词修饰以-thing为字尾的词语时,要放在这些词之后。例如:somethingnice

2、用形容词表示类别和整体:
1)某些形容词加上定冠词可以泛指一类人,与谓语动词的复数连接。如:the dead,the living,the rich,the poor,the blind,the hungry The poorarelosinghope.穷人失去了希望。
2)有关国家和民族的形容词加上定冠词指这个民族的整体,与动词的复数连用。如:the British,the English,the French,the Chinese. The English have wonderful senseofhumor.

以-ly结尾的形容词:
1)大部分形容词加-ly可构成副词。但friendly,deadly,lovely,lonely,likely,lively,ugly,brotherly,仍为形容词。改错:
如:(错)She sang lovely.
        (错)He spoke to me very friendly.
        (对)Her singing was lovely.
        (对)He spoke to me in a very friendly way.
2)有些以-ly结尾既为形容词,也为副词。 daily,weekly,monthly,yearly,early .
如:The Times is a daily paper. 
        The Times is published daily.


形容词知识体系:

 


复合形容词的构成

(1)形容词+名词+ed:
          如:kind-hearted 好心的,white-haired 白发的
(2)形容词+形容词:
          如:red-hot 炽热的,dark-blue 深蓝的
(3)形容词+现在分词:
          如:good-looking 好看的,easy-going 随和的
(4)副词+现在分词:
          如:hard-working 勤劳的,fast-moving 快速转动的
(5)副词+过去分词:
          如:hard-won 得来不易的,newly-made 新建的
(6)名词+形容词:
          如:life-long 终生的,world-famous 世界闻名的
(7)名词+现在分词:
          如:peace-loving 爱好和平的,fun-loving 爱开玩笑的
(8)名词+过去分词:
          如:snow-covered 白雪覆盖的,hand-made 手工的
(9)数词+名词+ed:
          如:four-storeyed 4层楼的,three-legged 3条腿的
(10)数词+名词(名词用单数):
          如:ten-year 10年的,  two-man 两人的


介词和介词短语的概念:

介词是一种用来表示词与词、词与句之间的关系的虚词,在句中不能单独作句子成分。介词后面一般有名词、代词或相当于名词的其他词类,短语或从句作它的宾语。介词和它的宾语构成介词词组,在句中作状语,表语,补语或介词宾语。介词可以分为时间介词、地点介词、方式介词和其他介词。


误用介词的三种情况:

1、多用介词:
多用介词可能是受汉语意思的影响将及物动词误用作不及物动词,也可能是受相关结构的影响而用错:
误:We discussed about the plan.
正:We discussed the plan. 我们讨论了计划。
误:Did he mention about the accident?
正:Did he mention the accident? 他提到那次事故了吗?
误:I saw her enter into the bank.
正:I saw her enter the bank. 我看见她进了银行。
误:He married with[to] a nurse.
正:He married a nurse. 他同一位护士结了婚。
误:How can contact with you?
正:How can contact you? 我怎么与你联系?
误:We should serve for the people heart and soul.
正:We should serve the people heart and soul. 我们应该全心全意地为人民服务。
误:Who controls over the factory? (但名词control可接over)
正:Who controls the factory? 谁管理这个工厂?
误:He has a great many of friends here. (比较a great number of)
正:He has a great many friends here. 他在这儿有很多朋友。

2、漏用介词:
漏用介词可能是受汉语意思的影响将不及物动词误用作及物动词,或是受相关结构的影响的影响而用错等:
误:This matter is difficult to deal. (deal with=处理)
正:This matter is difficult to deal with. 这事很难处理。
误:He is not a man to be depended.
正:He is not a man to be depended on. 他不是个可靠的人。
误:He took a cup of tea, and went on the story.
正:He took a cup of tea, and wentonwiththestory.他喝了一口茶,又接着讲故事。
误:My mother still regards me a child. (比较consider…as中的as可省略)
正:My mother still regards me as a child. 我母亲还把我当小孩看。
误:They insisted sending a car over to fetch us.
正:They insisted on sending a car over to fetch us.他们坚持要派车来接我们。
误:What he says is worth listening.
正:What he said is worth listening to.他的话值得一听。

3、错用介词:
错用介词的情况比较复杂,可能是因受汉语意思的而错,也可能是因弄不清搭配关系而错,可能是混淆用法而错,也可能是受相关结构的影响而错,可能是忽略语境而错,也可能是想当然的用错:
误:She called on his office yesterday. (call on+人,call at+地点)
正:She called at his office yesterday. 她昨天去了他办公室拜访。
误:He is engaged with a nurse.
正:He is engaged to a nurse.他与一位护士订了婚。
误:The sun rises from the east.
正:The sun rises in the east.太阳从东方升起。
误:Under his help, I finished it in time.
正:With his help, I finished it in time. 在他的帮助下,我及时做完了。
误:During he was in Japan, he visited many places.
正:During his stay in Japan, he visited many places.他在日本期间,参观过许多地方。
误:We are familiar to his character.
正:We are familiar with his character.我们了解他的性格。
误:Help yourself with the fruit.
正:Help yourself to the fruit.吃点水果吧。


介词的宾语:

 1、名词或代词作介词宾语:
如:Are you interested in history? 你对历史感兴趣吗?
        Don't worry about it. 别为它担心。
注:若是人称代词用作介词宾语,要注意用宾格。
如:No one can sing like her. 没有人能像她那样唱歌。(不能用like she)
2、动名词作介词宾语:
如:He is good at telling stories. 他善于讲故事。 
        In crossing the street he was run over. 他在穿过马路时被汽车撞倒。
3、过去分词作介词宾语:
如:We can't regard the matter as settled. 我们不能认为这事已经解决。
        I take it for granted you have read the book. 我以为你读过这本书。
:过去分词用作介词宾语通常只见于某些固定结构中,如上面第1句涉及regard…as(认为…是)结构,第2句涉及take sth for granted(认为某事属实)。在其他情况下,介词后通常不直接跟过去分词作宾语,若语义上需要接过去分词(表被动),可换用“being+过去分词”:
如:He went out without being seen by the others.他出去了,没有被其他人看见。
4、从句作介词宾语:
如:He was not satisfied with what she said. 他对她说的不满意。
        I'm worried about where he is. 我担心他上哪儿去了。
:介词后通常不接that从句,遇此情况需考虑用其他结构:
误:He paid no attention to that she was poor.
正:He paid no attention to the fact that she was poor. 他根本不注意她很穷这一事实。
但有个别介词(如except)可接that从句。
比较:I know nothing about him except that he lives next door./I know nothing about him except for the fact that he lives next door. 我只知道他住在隔壁,其它的就不知道了。
5、不定式作介词宾语:
如:I had no choice but to wait. 除了等,我没有别的选择。 
       He wanted nothing but to stay there. 他只想留在那儿。
       They did nothing but complain. 他们老是一个劲地抱怨。 
       He never did anything but watch TV. 除了看电视,他从不干任何事。
:(1)介词后接不定式的情形通常只见于but, except等极个别个词。该不定式有时带to,有时不带to,其区别是:若其前出现了动词do,其后的不定式通常不带to;
若其前没有出现动词do,则其后的不定式通常带to。 
(2)介词后虽然通常不直接跟不定式作宾语,但却可接“连接代词(副词)+不定式”结构:
如:He gave me some advice on how to do it. 对于如何做这事他给我提了些建议。
6、形容词作介词宾语:
如:Her pronunciation is far from perfect. 她的语音远不是完美的。
        In short, we must be prepared. 总而言之,我们要有准备。
        Things have gone from bad to worse. 事情越来越糟。
:(1)有些形容词用作介词宾语可视为其前省略了动名词being:
如:He regarded the situationas(being) serious. 他认为形势严重。
        His work is far from(being) satisfactory. 他的工作丝毫不令人满意。 
(2)有些“介词+形容词”的结构已构成固定搭配:in full全部地,全面地,无省略地; in private私下地,秘密地; in particular特别地;in general一般地,通常地,概括地; in brief 简言之;in short总之,简言之; in vain徒然地,徒劳无益地;for fee免费地,无偿地; for certain肯定地,确切地;for sure肯定地,确切地; for short为了简短,简称;atl arge自由自在地,逍遥法外; by far…得多
7、副词作介词宾语:
如:I can't stay for long. 我不能久呆。 
        It's too hot in here. 这里面太热了。
        I looked every where except there. 除了那儿,我到处都看过了。
8、数词作介词宾语:
如:The city has a population of four million. 这座城市有四百万人口。
        He was among the first to arrive. 他是第一批到的。
9、介词短语作介词宾语:
如:Choose a book from among these. 从这些书中选一本吧。
        I saw her from across the street. 我从街的对面望见了她。
:通常可后接介词短语作宾语的介词是from, till, until, since, except, instead of等。
比较:I took it from the bed. 我从床那儿(或床上)拿的。
            I took it from under the bed. 我从床下拿的。 
10、复合结构用作介词宾语:
如:She had no objection to Mary marrying him. 她不反对玛丽与他结婚。
        She came in with a book in her hand. 她手里拿着一本书走了进来。
        All the afternoon he worked with the door locked. 整个下午他都锁着门在房里工作。

介词短语的句法功能:
1、表语:
如:He was with a friend. 他和一个朋友在一起。
        Health is above wealth. 健康胜过财富。
        This knife is for cutting bread. 这把小刀是用于切面包的。
:有些介词(如because of)引出的短语通常只用作状语,不用作表语:
误:His absence is because of the rain.
正:His absence is due to the rain. 他因雨未来。
但是,若主语是代词(不是名词),becauseof引出的短语可用作表语:
如:It is because of hard work. 那是因为辛苦工作的原因。
2、状语:
如:Don't touch it with your hands. 别用手去摸它。
        Did you do this by design or by accident? 你这样做是有意的还是无意的?
3、定语:
如:This is his reply to your letter. 这是他给你的回信。
        This is the best way of doing it. 这是做此事最好的方法。
        My love for you is deeper than the sea. 我对你的爱比海深。
4、宾语补足语:
如:I found everythingin good condition. 我发现一切正常。
       Her illness kept her in bed for a week. 她因生病在床上躺了一星期。
:用作宾语补足语的介词短语在相应的被动语态中则为主语补足语:
如:He was regarded as a hero. 他被看成是英雄。
5、宾语:
如:A man stepped out from behind the wall. 一个人从墙后走出来。
        He cannot spare anytime except on Sunday. 除星期日外,他抽不出时间。
6、主语:
如:Between6 and 7 suits me. 六点到七点对我比较适合。
        After the exams is the time to relax. 考试后是轻松一下的时间。
:介词短语通常不用作主语,尽管有时也像上面这样用作主语,但通常可视为是在一定的上下文中有所省略:
如:—When are we going to have the next meeting? 我们下次什么时候见面?
        —On Tuesday may be convenient. 星期二可能比较方便。
此句中onTuesday虽用作主语,但可视为是其前省略了meeting一词:
即:Meeting during the vacation may be convenient.


并列连词的概念:

连词是一种虚词,它不能独立担任句子成分而只起连接词与词,短语与短语以及句与句的作用。连词主要可分为两类:并列连词和从属连词。并列连词用来连接平行的词、词组和分句。如:and, but, or, nor, so, therefore, yet, however, for, hence, as well as, both...and, notonly...butalso, either...or, neither...nor, (and)then 等等。


并列连词与并列结构:

并列连词引导两个并列的句子。
1)and与or:
判断改错:
(错) They sat down and talk about something.
(错) They started to dance and sang.
(错) I saw two men sitting behind and whisper there.
(对) They sat down and talked about something.
(对) They started to dance and sing.
(对) I saw two men sitting behind and whispering there.
解析:第一句:and连接两个并列的谓语,所以talk应改为talked。
            第二句:and连接两个并列的动词不定式,第二个不定式往往省略to,因此sang应改为sing。
            第三句:and连接感观动词saw后面的用作的宾补的两个并列分词结构,因此whisper应改为whispering。
注意:and还可以和祈使句或名词词组连用表示条件。(or也有此用法)
如:Make up your mind, and you'll get the chance.=If you make up your mind, you'll get the chance.
        One more effort, and you'll succeed.=If you make one more effort, you'll succeed.
2)both...and 两者都
如:She plays(both) the piano and the guitar.
3)not only...but(also), as well as 不但…而且
如:She plays not only the piano, but(also) the guitar.
注意:not only…but also关联两个分句时,一个分句因有否定词not而必须倒装。
如:Not only does he like reading stories, but also he can even write some.
4)neither...nor 意思为“既不……也不……”谓语动词采用就近原则,与nor后的词保持一致。
如:Neither you nor he is to blame.


比较so和such :

so与such的用法由不同词性决定。such是形容词,修饰名词或名词词组,so是副词,只能修饰形容词或副词。so还可与表示数量的形容词many,few,much,little连用,形成固定搭配。
构成:so+adj.
            such+a(n)+n.
            so+adj.+a(n)+n.
            such+n.(pl.)
            so+adj.+n.(pl.)
            such+n.(pl.)
            so+adj.+n.[不可数] 
            such+n.[不可数]
如:so foolish 
        such a fool  
        so nice a flower 
        such a nice flower 
        so many/few flowers 
        such nice flowers 
        so much/ little money.
        such rapid progress
        so many people
        such a lot of people
:so many 已成固定搭配,a lot of 虽相当于many,但a lot of为名词性的,只能用such搭配。 so...that与such...that之间的转换既为so与such之间的转换。


并列连词用法点拨:

1、表示并列关系:
1)or意思为“否则”。
如:I must work hard, or I'll fail in the exam.
2)either...or意思为“或者……或者……”。注意谓语动词采用就近原则。
如:Either you or I am right.
2、表示转折或对比关系:
1)but表示转折,while表示对比。
如:Some people love cats, while others hate them.
典型例题:
—Would you like to come to dinner tonight?
—I'd like to, ___ I'm too busy.
    A. and
    B. so
    C. as
    D. but
答案:D。but与前面形成转折,符合语意。而表并列的and,结果的so,原因的as都不符合句意。
2)not...but...意思为“不是……而是……” not和but后面的用词要遵循一致原则。
如:They were not the bones of an animal, but(the bones) of a human being.
3、表示原因关系:
1)for 判断改错:
(错)For he is ill, he is absent today.
(对)He is absent today, for he is ill.  for是并列连词,不能置于含两个并列分句的句子的句首,只能将其放在两个分句中间。


并列连词知识体系

种类 用法 举例
并列连词 表示转折关系 yet, but等
表示并列关系 and, or, either...or..., as welll as等
表示因果关系 for, so等

比较and和or的用法:

1)并列结构中,or通常用于否定句,and用于肯定句。
2)但有时and也可用于否定句。请注意其不同特点:
如:There is no air or water in the moon.
        There is no air and no water on the moon.
在否定中并列结构用or连接,但含有两个否定词的句子实际被看作是肯定结构,因此要用and。

典型例题

—I don't like chicken___fish.
—I don't like chicken, ___I like fish very much.
A. and;and
B. and;but
C. or;but
D. or;and
答案:C。否定句中表并列用or,but表转折。
判断改错:
(错)We will die without air and water.
(错)We can't live without air or water.
(对)We will die without air or water.
(对)We can't live without air and water.


从属连词的概念:

连词用于引导从句以形成句子的一部分或修饰句子的构成要素的叫作从属连词。


英语从属连词用法分类详解:

1、引导时间状语从句的从属连词:
 (1)表示“当…时候”或“每当”的时间连词。主要的when, while, as, whenever:
如:He jumped up when the phone rang. 电话铃响时他吓了一跳。 
        We listened while the teacher read. 老师朗读时我们听着。
        The phone rang just as I was leaving. 我正要离开,电话铃就响了起来。
(2)表示“在…之前(或之后)”的时间连词。主要的有before, after:
如:Turn the lights off before you leave. 离开前请关灯。
        He started the job soon after he left the university. 他大学毕业后就开始做这份工作。
(3)表示“自从”或“直到”的时间连词。主要的有since, until, till:
如:He has lived here since he got married. 他结婚后就一直住在这儿。
        Most men worked until[till] they're 65. 大多数男人工作到65岁。
(4)表示“一…就”的时间连词。主要的有as soon as, the moment, the minute, the second, the instant, immediately, directly, instantly, once, no sooner…than, hardly…when等:
如:Tell him the news as soon as you see him. 你一见到他就把这消息告诉他。
        I recognized her the moment(that) I saw her. 我一看到她就认出她来了。
        I want to see him the minute(that) he arrives. 他一到来我就要见他。
        I went home directly I had finished work. 我一干完活就回家了。
       Once he arrives, we can start. 他一来我们就可以开始。
(5)表示“上次”、“下次”、“每次”等的时间连词。主要的有every time(每次),each time(每次),(the) next time(下次),any time(随时),(the) last time(上次),the first time(第一次):
如:Last time I saw him, he looked ill. 上次我见到他的时候,他好像有病。
        Next time you're in London come and visit us. 你下次来伦敦过来探望我们。
        Do look me up next time you're in London. 你下次到伦敦来,一定来找我。
        Every time I call on him, he is out. 我每次去访问他,他都不在。
       You can call me any time you want to. 你随时都可以给我打电话。
【注】every time,each time,any time前不用冠词,(the)next time, (the)last time中的冠词可以省略,而the first time中的冠词通常不能省略。
2、引导条件状语从句的从属连词:
这类连词主要有if, unless, as[so] long as, incase等:
如:If anyone calls tell them I'm not at home. 要是有人打电话来,就说我不在家。
        You will fail unless you work hard. 你若不努力就会失败。
        As[So] long as you need me, I'll stay. 只要你需要我,我就留下。
        In case I forget, please remind me about it. 万一我忘记,请提醒我一下。
【注】在条件状语从句中,通常要用一般现在时表示将来意义,而不能直接使用将来时态。不过,有时表示条件的if之后可能用will,但那不是将来时态,而是表示意愿或委婉的请求(will为情态动词):
如:If you will wait a moment, I'll fetch the money. 请等一下,我就去拿钱。
3、引导目的状语从句的从属连词:
主要有in order that, so that, in case, for fear等:
如:We used the computer in order that we might save time. 我们使用计算机是为了节约时间。
        Speak clearly so that they may understand you. 说清楚,以便让他们能明白你的意思。
        Be quiet in case you should wake the baby. 安静些,免得把婴儿吵醒。
        He is working hard for fear he should fail. 他努力工作以免会失败。
4、引导结果状语从句的从属连词:
主要的有so that, so…that, such…that等:
如:We're all here now, so that the meeting can begin at last. 我们现在都到齐了,终于能开会了。
        It's so difficult a question that none of us can answer it. 那是一个很难的问题,我们没有一个人能回答。
        He shut the window with such force that the glass broke. 他关窗户用力很大,结果玻璃震破了。
【注】so that中的that在口语中通常可以省略。
5、引导原因状语从句的从属连词:
主要的有because, as, since, seeing(that), now(that), considering(that)等:
如:He couldn't got to school because he had a cold. 他因患感冒而未能去上学。
        Since everybody is here, let's begin our discussion. 大家都到了,我们就开始吧。
        Seeing that it is 8o'clock, we'll wait no longer. 由于时间已到8点,我们将不再等了。
        Now that you are here, you'd better stay. 你既然来了,最好还是留下吧。
6、引导让步状语从句的从属连词:
主要有although, though, eventhough, even if, while, however, whatever, whoever, whenever, wherever等:
如:Although[Though] he is poor, he is well contented. 他虽穷却能知足常乐。
        Though[Even though] it's hard work, I enjoy it. 尽管是苦活,但我乐意干。
        Even if you don't like wine, try a glass of this. 即使你不喜欢喝酒,也尝尝这杯吧。
7、引导方式状语从句的从属连词:
主要有as, like, as if, as though, the way等:
如:Do it as[like] he does. 像他那样做。
        He behaved as if nothing had happened. 他装作若无其事的样子。
        They treat me as though I were a stranger. 他们待我如陌生人。
        Nobody else loves you the way(=as) I do.没有人像我这样爱你。
8、引导地点状语从句的从属连词:
主要有where, wherever, everywhere等:
如:There were lots of parks where I lived. 我住的地方有许多公园。
        Sit wherever you like. 你想坐在那儿就坐在那儿。
        Everywhere they went, they were warmly welcomed. 他们每到一个地方都受到热烈欢迎。
9、引导比较状语从句的从属连词:
主要有than和as…as:
如:It's easier than I thought. 这比我想像的要容易。
        They are as often wrong as they are right. 他们错对各半。
10、引导名词性从句的从属连词:
主要有that, if, whether:
如:It is clear enough what he meant. 他是什么意思很清楚。 
       Your greatest fault is that you are careless. 你最大的缺点是粗心大意。
       Whether it will do us harm remains to be seen.是否对我们有害还要看一看。
       She didn't say if he was still alive. 她没说他是否还活着。


从属连词知识体系:

 


用作从属连词的六类名词结构:

英语中有些名词结构可用作从属连词,用以引导状语从句,且主要是时间状语从句。这类结构归纳起来有以下六类:
一、the+瞬间名词:
其中的瞬间名词主要包括moment, minute, instant, second等,其意为“一……就……”,相当于as soon as。
如:The minute he saw her he fell in love. 他对她一见倾心。  
Telephone me the moment(that) you get the results. 你一有结果,马上给我打电话。 
I was so tired that I fell asleep the instant I closed my eyes. 我很累,一合上眼就睡着了。
Sheputdownthereceiverthesecondsherecognizedmyvoice.她一听出是我的声音,马上就放下电话听筒。
注:其中的瞬间名词后可接that,也可省略。另外,有的个别副词(如directly/immediately等)也可表示类似意思。
如: Immediately the meal was over,he switchedon the radio.饭一吃完他就把收音机打开。

二、the+季节名词:
其中的季节名词包括spring,summer,autumn,winter,其意为“在……的那年春天、夏天、秋天、冬天。
如:His wife left him thes pring he went abroad.在他出国的那年春天,他的妻子离开了他。
He sold his house and went to the souththe summer he lost hisjob.在他失业的那年夏天,他卖掉房子去了南方。
He was sentto prison the winter his third daughter was born.在他第三个女儿出生的那年冬天,他被关进了监狱。
She got married the autumn she graduated from college.她大学毕业的那年秋天就结婚了。

三、the+时间名词:
其中的时间名词主要包括hour,day,night,week,month,season,year等,其意为“在……的时候、那天、那个晚上、那周、那个月、那个季节、那年”。
如: The hour he wa sin her office,he felt very sad.当他在她办公室的时候,他感到很伤心。
The day here turned home,his father was already dead.他回家的那一天,他的父亲已经死了。
The night I wenttoseeher,shehadleftforBeijingtoattendanimportantmeeting.就我去看她的那个晚上,她到北京去开一个重要的会议了。
Mr Smith didn't go to work the week his wife was ill.史密斯先生在他妻子生病的那个星期没去上班。
They ear helivedinthecountry,he learned alot.他在乡下呆的那一年,他学到了不少东西。

四、the+序数词+time
其中的序数词包括first,second,third,fourth等,其意为“当第几次……的时候”。
如: My girlfriend beat me at pokert he first time weplayed.我头一次和女朋友打扑克,她就把我赢了。
These cond time I saw her,she looked like an old woman.我第二次见到她时,她看上去像一个老太婆。
The third time I went there,I found all of them had left and the offices were all empty.我第三次去那儿时,我发现他们都离开了,所有的办公室都是空的。
注:
1.next,last也具有类似序数词的性质,因此也具有以上用法。
如: Nexttimeyoucomein,pleaseclosethedoor.下次你进来,请关门。
Thelasttimewetalkedhesaidheneededanothertwodays.上次我们谈话时他说他还需要两天。
2.thefirsttime,thesecondtime,thethirdtime等用作连词引导时间状语从句时,其前通常要有定冠词,而(the)nexttime,(the)lasttime引导状语从句时,其中的冠词可以省略,如下面这道上海高考题,其答案是C,不是A:
I though ther nice and honest______Imether.
A.first time  B.fo rthe first time C.the first timeD.by the first time

五、不定代词+time
其中的不定代词主要包括each,every,any等。
如:Every time I ringher,the phone is engaged.我每次给她打电话,电话都占线。
Every time I see him he either wants to tell me his trouble or borrow some money.每次我见到他,他不是向我诉苦,就是要向我借钱。
He felt nervous each times he spoke to him.每次她和他讲话,他都感到紧张。
AnytimeyoucometoLondondolookmeup.你无论什么时候到伦敦来,一定要来看我。
注意:everytime,eachtime,anytime用作连词引导状语从句时其前习惯上不用冠词,它与the first time,these cond time,the third time等引导时间状语从句时其前必须要用定冠词不同。

六、其他名词结构
以上归纳的名词结构均用于引导时间状语从句,有些其他结构还可引导其他性质的状语从句,如the way可用于引导方式状语从句,表示“像……一样”。如:
The didn’t do it the way we do now.那时他们不像我们现在这样行事。
Joyce looked at me the way alotof girls did.乔伊丝像许多姑娘那样瞧着我。
注:这样用的theway与as用法相似。
如:Hold itin both hands,the way(=as)Mummy does.用两只手捧住,像妈妈那样。


助动词的概念:

助动词是帮助主要动词构成各种时态,语态,语气以及否定或疑问结构的动词。助动词分为时态助动词和结构助动词两种。


助动词的用法:

1、助动词be的用法:
1)be+现在分词,构成进行时态。
例如:They are having a meeting. 他们正在开会。
            English is becoming more and more important. 英语现在越来越重要。
2)be+过去分词,构成被动语态。
例如:The window was broken by Tom. 窗户是汤姆打碎的。
            English is taught through out the world. 世界各地都教英语。
3)be+动词不定式,可表示下列内容: 
a. 表示最近、未来的计划或安排。
例如:He is to go to NewYork next week. 他下周要去纽约。  
            We are to teach the freshmen. 我们要教新生。  
说明:这种用法也可以说成是一种将来时态表达法。 
b. 表示命令。
例如:You are to explain this. 对此你要做出解释。  
            He is to come to the office this afternoon. 要他今天下午来办公室。 
c. 征求意见。
例如:How am I to answer him? 我该怎样答复他?  
            Who is to go there? 谁该去那儿呢? 
d. 表示相约、商定。
例如:We are to meet at the schoolgate at seven tomorrow morning. 我们明天早晨7点在校门口集合。

2、助动词have的用法

1)have+过去分词,构成完成时态。
例如:He has left for London. 他已去了伦敦。  
            By the end of last month, they had finished half of their work. 上月未为止,他们已经完成工作的一半。  
2)have+been+现在分词,构成完成进行时。
例如:I have been studying English for ten years. 我一直在学英语,已达十年之久。 
3)have+been+过去分词,构成完成式被动语态。
例如:English has been taught in China for many years. 中国教英语已经多年。

3、助动词do的用法:

1)构成一般疑问句。
例如:Do you want to pass the CET? 你想通过大学英语测试吗? 
            Did you study German? 你们学过德语吗?
2)do+not构成否定句。
例如:I do not want to be criticized. 我不想挨批评。 
            He doesn't like to study. 他不想学习。 
            In the past, many students did not know the importance of English. 过去,好多学生不知道英语的重要性。
3)构成否定祈使句。
例如:Don't go there. 不要去那里。 
            Don't be so absent-minded. 不要这么心不在焉。
说明:构成否定祈使句只用do,不用did和does。
4)放在动词原形前,加强该动词的语气。
例如:Do come to my birthday party. 一定来参加我的生日宴会。 
            I did go there. 我确实去那儿了。 
            I do miss you. 我确实想你。
5)用于倒装句。
例如:Never did I hear of such a thing. 我从未听说过这样的事情。 
            Only when we begin our college life do we realize the importance of English. 进了大学以后,我们才认识到英语的重要性。
说明:引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等。
6)用作代动词。
例如:—Do you like Beijing? 你喜欢北京吗? 
            —Yes, I do. 是的,喜欢。(do用作代动词,代替like Beijing.) 
            He knows how to drive a car, doesn't he? 他知道如何开车,对吧?

4、助动词shall和will的用法:
 
shall和will作为助动词可以与动词原形一起构成一般将来时。
例如:I shall study harder at English. 我将更加努力地学习英语。   
            He will go to Shang hai.  他要去上海。
说明:在过去的语法中,语法学家说shall用于第一人称,will只用于第二、第三人称。现在,尤其是在口语中,will常用于第一人称,但shall只用于第一人称,如用于第二、第三人称,就失去助动词的意义,已变为情态动词。
试比较:He shall come. 他必须来。(shall有命令的意味。) 
                He will come. 他要来。(will只与动词原形构成一般将来时。)

5、助动词should,would的用法

1)should无词义,只是shall的过去形式,与动词原形构成过去将来时,只用于第一人称。
例如:I telephoned him yesterday to ask what I should do next week. 我昨天给他打电话,问他我下周干什么。 
比较:"What shall I do next week?" I asked. “我下周干什么?”我问道。 
可以说,shall变成间接引语时,变成了should。
2)would也无词义,是will的过去形式,与动词原形构成过去将来时,用于第二、第三人称。
例如:He said he would come. 他说他要来。
比较:"I will go," he said. 他说:“我要去那儿。”变成间接引语,就成了He said he would come。原来的will变成would,go变成了come。


助动词知识体系:

  


常见的助动词用法解析:

 


动词短语的概念:

动词常和某些其他词类用在一起,构成固定词组,形成所谓短语动词(phrasalverb)。和动词一样,短语动词也可分为及物和不及物两种。短语动词可以作为一个整体看待,同一般动词一样使用。


 动词短语的搭配类型:

1)动词+介词:
这类短语动词用作及物动词,后面须跟宾语。
如:The small boy insisted on going with his parents. 那男孩坚持要跟父母一起去。
        Do you often listen to broadcasts in English? 你常听英语广播吗?
        Look at the children. Aren't they lovely? 看着这些孩子们。他们多么可爱呀!
        We stand for self-reliance. 我们是主张自力更生的。
这一类的短语动词还有很多,如depend on(upon)(依靠),wait on(服侍),look for(寻找),deal with(对待),look after(照料),wait for(等待)等。
2)动词+副词
这类短语动词有的用作及物动词,有的用作不及物动词。
如:I always get up as soon as the bell rings. 我总是一打铃就起床。(不及物)
        Look out, there's a car coming! 当心,来汽车了!(不及物)
        Have you handed in your exercises already? 你已经交练习了吗?(及物)
        Please don't forget to put on your coat, it's cold outside. 请不要忘记穿外衣,外面很冷。(及物)
这一类的短语动词还有很多,及物如put out(扑灭),eat up(吃光),put down(放下);不及物如set off(出发),come up(走近),go on(继续)。
注:"动词+副词"这类短语动词和上面第一类"动词+介词"的不同之处在于:"动词+介词"用作及物动词,后面须跟宾语。"动词+副词"则有的及物,有的不及物;用作及物动词而宾语为人称代词或自身代词时,副词往往放在宾语之后。
如:Please wake me up at five tomorrow. 请在明天早上五点唤醒我。
        If you have done your exercises, please hand them in. 如果你们练习做完了请交来。
        She doesn't normally behave like that, she's putting it on. 她通常并不如此表现,她是装出来的。
注:这类短语动词有不少可兼作及物和不及物动词用。
如:He took off his hat when he entered the office. 他进办公室后脱下帽子。(及物)
        The plane took off at seven sharp. 飞机在七点整起飞。(不及物)
        Charlie rang up Neil to ask about the time of the meeting. 查理打电话给尼尔问开会的时间。(及物)
        If you can't come, please ring up and let us know. 你如来不了,请来电话告诉我们一声。(不及物)
3)动词+副词+介词:
"动词+副词"之后有的可以再加一个介词,形成另一种短语动词。这类短语动词用作及物动词。
如:Do not give up hope. We must go on with the experiment 不要失望。我们必须继续试验。(go on with继续)
        He came up to me. 他走到我跟前。(come up to走近)
这类短语动词还有:look down upon(看不起),do away with(去掉),put up with(忍受)等。
4)动词+名词+介词:
这类短语动词也是及物的。
如:He shook hands with all the guests at the banquet. 他在宴会上和宾客一一握手。
        Young pioneers often come to the Children's Palace to take part in after school activities.少先队员经常到少年宫来参加课外活动。
        Pay attention to the temperature of the stored rice. 注意仓库里的稻谷的温度。
        Her job is taking care of the babies. 她的工作是照顾婴儿。
这一类短语动词还有:put an end to(结束),take notice of(注意),catch hold of(抓住),lose sight of(看不见),make use of(利用)等。

动词短语知识体系:

 


it的概念:

it可用作人称代词、指示代词、先行词及引导词等。


it 的用法:

1、it可指天气、温度、时间、距离等 。
如:It is cold today, isn't it?
2、用作人称代词,代替前文提到过的事物。
如:The dog is not  acold-blooded animals.  It doesn't need to hibernate.
3、为避免重复,it可用来代替前面说过的短语或句子。
如:I tried to persuade my father to give up smoking, but found it impossible. (it=to persuade my father to give up smoking)
4、代替指示代词this,that。
如:—What's this?
        —It's an album.
        —Whose new bike is that?
        —It's Mary's.
注:it与one,that的区别:
        it=the(this, that)+名词,特指并且代替前面所提到的某特定事物。
如:He's bought a new car, so he drives it everywhere to show ito ff.
        one=a+名词,one指前面提到的同类事物中的不同的另一个。
如:He needs a computer, but he can't afford one.
        that=the+名词,that指代的名词与前面的名词属于同一类,但不属同一个。
如:The population of China is larger than that of Japan.  that指代population,但其后有一个of短语作定语,以区别于the population of China。
:it与that的异同:
        it指同一事物,that指同类但并不是同一事物。
如:I like the climate of Kunming more than that of Beijing.
       The climate of Kunming is mild, and I like it.
5、It/This/That+be+the first(second, third...) time+that-clause 这个句型表示截止到说话时为止的某人的一种经历,关键是注意time前有序数词,主句是一般现在时is时,从句要用现在完成时;如果主句用一般过去时was时,则从句须相应地用过去完成时。
如:This is the first time(that) these Europeans have visited the Great Wall.
        It was the fifth time(that) I had paid a friendly visit to America.
6、在一些相对固定的词组中,没有特殊含义,经常不翻译。
如:He's never really made it as an actor. 作为演员,他从未获得过真正的成功。
        It is my turn. 轮到我了。


强调句中的it:

可以用来改变句子结构,使句子的某一成分得到强调:
1)强调句的基本句型it's/was+被强调成分+that/who+其他成分
原句:I told Jim the news in our office yesterday.
强调主语:It was I that/who told Jim the news in our office yesterday.
强调宾语:It was Jim that I told the news in our office yesterday.
            或:It was the news that I told Jim in our office yesterday.
强调地点状语:It was in our office that I told Jim the news yesterday.
强调时间状语:It was yesterday that I told Jim the news in our office.
2)强调句的一般疑问句型Is/Was+it+所强调部分+that/who...?
如:Was it you that told Jim the news in your office yesterday?
3)强调句的特殊疑问句型疑问词+is/was+it+that/who...?
如:Who was it that told Jim the news in your office yesterday?
【注】强调句与主语从句虽然在形式上很相似,即都含有it is(was)...that。但,区别在于:强调句去掉it is(was)…that之后,句子结构仍然完整,而主语从句却不能这样。
如:(It is)our hope(that) the two sides will work towards peace.
解析:去掉It is…that之后,句子是不成立的。由此得出该句不是强调句,而是一个简单的主语从句,it是形式主语,从句是真正的主语。


“it”的用法:

1、it 作形式主语:
it 在句中可作形式主语,而真正作主语的主语从句需要放在句子的末尾。主语从句后置常用以下几种结构:
1)It is/was+adj.+subject-clause可用于此句型的形容词有:
clear, certain, funny, good, impossible, likely, natural, obvious, possible, probable, strange, surprising, true, unusual, wonderful等。
如:It is obvious that going for sports will do a lot of good to your health.
2)It+be+adj./n.(forsb./ofsb.)+todosth. 该句型中的形容词通常表示事物的特点或特征的,如:
difficult, hard, easy, impossible, necessary, important等,此时用for;或表示人的性格特征或特点的,如:
nice, good, bad, kind, silly, foolish, wise, clever, careless, rude, brave, cruel, careful, grateful等,这时要用of 。
3)It is/was+名词词组+subject-clause可用于该结构的名词词组有:
a pity/duty, a good thing, no surprise, good news, an honor, a fact, a mystery, a shame, manners等。
 如:It's a pity that I didn't attend the party.
4)It is/was+V-ed+subject-clause可用于该结构的动词的过去分词有:
said, reported, thought, supposed, believed, hoped, expected, known, decided, announced, arranged等。
如:It is said that something had been done to end the pollution.
注:本句还可改写为:Something is said to have been done to end the pollution.
5)It+vi.+subject-clause可用于该结构的动词有:appear, seem, happen, occur等。
 如:It appeared to scientists that the stars had moved.
6)It doesn't matter(makes no difference,etc.) +连接代词或连接副词引起的从句作宾语。
如:It doesn't matter whether he'll join the army or not.
        It makes no difference where we have the conference.
7)一些固定句型:
It takes sb. some time to do sth.
如:It will take you two days to get there on foot. 
It costs sb. some money to do sth.
如:It costs 1,000 dollars to fly to America.
It is/was no use(useless) doing(做什么是没有用处的)
如:It's no use arguing with him.
It is/was no good doing(做什么是没有好处的)
8)以下句型结构中需要用虚拟语气
① It is/was important(necessary, strange) that...;
     It is/was ordered(required, suggested, proposed) that...;
     It is/was a pity(a shame) that...表示遗憾等感情的句子中,主语从句要用“should+动词原形”,should可以省略。
如:It's necessary that he(should) be operated on at once.
② It is (high)time that...结构中用should+动词原形(should不能省略)或动词过去式。
如:It is high time that you should make(made) full use of your time to go over your lessons.

2、it作形式宾语
1)动词consider(feel, find, think等)+it+形容词(名词)+不定式(动词-ing形式,从句)。
 如:She thinks it no use telling me.
2)主语+appreciate(enjoy,like,love,hate)+it+if(when)...结构
如:We would appreciate it if you could come to help us.
3)dependon, relyon, see to(负责/设法做到), takeforgranted(习以为常)等短语后跟that从句时,要以it作形式宾语。
如:We're depending on it that he will finish the job by Friday.


“it ”引起的几个易混淆的时间句型:

1)It be+时间+since-clause 这个句型表示从since从句谓语动作发生以后到现在或过去所经过的一段时间,意为“自从…以来已多久了”,主句多用一般现在时,从句用一般过去时,如果表示过去的情况,主句一般用过去时,从句用过去完成时,或主句用过去完成时,从句用一般过去时。
:since引导时间状语从句时,从句若使用终止性动词,则表示该时间是主句时间段的终点(时间从现在算起);若从句使用延续性动词,则表示该动作状态的结束(时间从过去算起)。
如:It's five years since they got married. 他们结婚已经5年了。 
        It's five years since they were married. 他们离婚已经5年了。
        It's ten years since his father was a worker. 他父亲不当工人已经10年了。
        I haven't seen him since we were boys together. 我们长大以后再没有见过面。 
2)It be+时间+before-clause 这个句型中的时间一般为表示一段时间的词语(如:long years, months, weeks, days, hours, minutes),主句中的谓语动词用肯定式,意为“过多长时间才…”。主句的谓语动词是否定式时,意为“没过多长时间就…”。主句的时态可用过去时was或将来时willbe;用was时,before从句的动词用一般过去时;用willbe时,before从句常用一般现在时。 如:It was not long before she learned those poems by heart. 她没过多久就背会了那些诗。
        It was long before the police arrived. 过了很久警察才来。
        It will be hours before he makes a decision. 要过好几个小时他才会作出决定。
        It will not be hours before we meet again. 要不了几个小时我们还会再见面的
3)It be+时间+when-clause 这个句型中,it指时间,而且表示时间的词语前没有介词(时间一般是具体时间)。主句和从句中的谓语动词在时态上是一致的,主句是willbe,when从句用一般现在时代替将来时。
如:It was already 8 o'clock when we got home.
        It will be late afternoon when they get there. 
4)It be+时间+that-clause 这个句型是个强调句型。
如:It was at 5o'clock that he practiced playing the violin in the morning. (原句是:He practiced playing the violin at 5o'clock in the morning.)
比较:It was 5o'clock when he started in the morning.(5o'clock前没有介词,这个是定语从句)
5)It be+time+that-clause 这个句型属虚拟语气结构,不管主句中用的是is或was,that从句都须用动词的过去式或should+动词原形(但不及物动词通常用过去式),在time之前有时可以加上high 或about 以加强语气。
如:It is high time(that) he wrote a letter to his girl friend.
        It is time(that) we made people's life a little easier.= It is time that we should make people's life a little easier.