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初中二年级英语

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  • 句型转换
    句型转换。
    1. Both of my parents are teachers. (改为否定句)
    ________ of my parents ________ a teacher.
    2. He borrowed the book a week ago. (改为同义句)
    He has ________ the book ________ a week ago.
    3. I have ever been to an aquarium. ( 改为一般疑问句)
    ________ you ever ________ to an aquarium?
    4. The boy has few friends here. (改为反意疑问句)
    The boy has few friends here, ________ ________?
    5. The population of Beijing is2,500,000. ( 对画线部分线提问)
    ________ ________ the population of Beijing?
    6. He has been a football player for five years. (改为同义句)
    ________ five years ________ he became a football player.
    7. Could you please turn down the music? (改为同义句)
    Would you ________ ________ down the music?
    8. The woman teacher asked the students, "Can you understand what I am saying?" (改为间接引语)
    The woman teacher asked the students ________ ________ could understand what she was saying.
    本题信息:2011年甘肃省期末题英语句型转换难度较难 来源:张雪
  • 本题答案
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本试题 “句型转换。1. Both of my parents are teachers. (改为否定句)________ of my parents ________ a teacher.2. He borrowed the book a week ago. (改为同义句...” 主要考查您对

不定代词

疑问代词

实义动词

现在完成时

从属连词

一般疑问句

反意疑问句

直接引语,间接引语

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。
  • 不定代词
  • 疑问代词
  • 实义动词
  • 现在完成时
  • 从属连词
  • 一般疑问句
  • 反意疑问句
  • 直接引语,间接引语
  • it 的用法
不定代词
即不指明代替任何特定名词或形容词的代词。
初中常用不定代词有:
some(something,somebody,someone),any(anything,anybody,anyone), no(nothing,nobody,no one),
every(everything,everybody,everyone,),all,each,both,much,many,(a)little,(a)few,other(s),
another,none,one,either, neither等。一般来讲,修饰不定代词的词要置于其后。

不定代词用法例举:
①一般用于肯定句中的不定代词:some, someone, somebody, something
例如:They can speak some Japanese.
②一般用于否定句、疑问句和条件句中的不定代词:any, anyone, anybody, anything
例如:Is there anyone at home?
③一般用于句中表示否定意义的不定代词:no, no one, nobody, nothing
例如:I have no watch.
There is nothing wrong with the machine.
④不定代词one指代可数名词,既可指人,亦可指物,它可以代替上文中出现的单数可数
名词,指代复数名词时可以用ones。
例如:I do not have a pen, can you lend me one?
I like small cars better than large ones.
⑤none通常只用作名词,在句中作主语、宾语等。意为“没有任何(人或物)”,既可指人,亦可指物。
none后常跟of短语,其后用复数可数名词或不可数名词。
例如:None of them knows the answer to the question.
⑥both, all
both指两个人、物或群体;
all指三个以上的人、物或群体或泛指一切事物。
例如:My parents are both teachers.
           All of my friends are football fans.
⑦every, each
each一般用于指两个或两个以上的人或物,侧重个别;
every用于指三个或三个以上的人或物,侧重全体。而且each所指对象在上下文中已十分明确。
例如:Each student went to see that films. (学生至少二人)
            Every student went to the park.(学生至少三人)        
⑧other, the other, others, the others, another
other具有名词和形容词性质,既可指人,亦可指物。other常与定冠词the连用。
不定冠词an与other连用则组成another。other只作形容词或代词,表示“其他的,别的”,不可单独使用。
例如:Do you have any other questions?
the other作形容词或代词,特指两者中或两部分的另一个或另一部分。
例如:The bookshop is on the other side of the street.
 others相当于“other+名词”,泛指“别的人或物”,只有名词性用法。
例如:Some are planting trees, others are watering them.
the others相当于“the other+名词”,表示“剩下的,其余的”,特指除此之外的全部 人或物。
例如:There are forty-six students in our class. Two of them are foreign, the others are all Chinese.
another作形容词或代词,泛指三个或三个以上不定数目中的“另一个”。
例如:This pen is too expensive, please show me another.
⑨either, neither
either指“两者中的任何一个”;neither指“两者中无一”,具有否定意义。
例如:You can take either half.
Neither of the books is good.
⑩many, much, most
many和much具有名词和形容词的性质,都表示“许多、大量”。
Much一般只能指代或修饰不可数名词,many只能指代或修饰复数可数名词。Most指“大部分、大多数”。
例如:Many boys like playing soccer.
We have much homework to do every day.
Most students think so.
(11)few, a few, little, a little
a few 和a little 意为“少数、少量”,其意义是肯定的。
A few指代或修饰复数形式的可数名词,a little指代或修饰不可数名词。
Few 和little意为“几乎一点没有”,具有否定意义。
例如:He has a few friends here.
Hurry up! There is little time left.


不定代词的用法:
不定代词大都可以代替名词和形容词,在句中作主语、宾语、表语、定语和状语。
位置
不定代词+形容词
不定代词+to do
作主语
Both of them are teachers.他们两人都是教师。
作宾语
I know nothing about this person.我对这个人一无所知。
作表语
This book is too much for a child.这本书对一个小孩来说太难了。
作定语
There is a little water in the glass.玻璃杯里有一些水。
作状语
I can't find my book anywhere.我在任何地方都不能找到我的书。
修饰不定代词的词,一般情况下要后置。

疑问代词:
疑问代词在句中起名词的作用,用来构成疑问句。常用的疑问代词有:   
what, who, whose, whom, which, whatever, whichever, whoever, whomever   
疑问代词在句中应位于谓语动词之前,没有词性和数的变化,除who之外也没有格的变化。 
what, which, whose还可作限定词。
Whose books are these on the desk?
桌上的书是谁的?
What was the directional flow of U. S. territorial expansion?
美国的领土扩张是朝哪个方向的?
What events led to most of the east of the Mississippi River becoming part of the United States?
哪些事件使密西西比河以东的大部分土地归属于美国?
疑问代词在句中起名词词组的作用,用来构成疑问句。疑问代词有下列几个:
指 人: who, whom, whose
指 物: what
既可指人又可指物: which


疑问代词说明:
一、无论是做疑问代词还是限定词,which 和 what 所指的范围不同。what所指的范围是无限的,而which则指在一定的范围内,例如:
Which girls do you like best?
你喜欢哪几个姑娘?
What girls do you like best?
你喜欢什么样的姑娘?

二、Whom是who的宾格,在书面语中,它作动词宾语或介词宾语,在口语中作宾语时,可用who代替,但在介词后只能用whom, 例如:
Who(m) did you meet on the street?
你在街上遇到了谁?(作动词宾语)
Who(m) are you taking the book to?
你要把这书带给谁?(作介词宾语,置句首)
To whom did you speak on the campus?
你在校园里和谁讲话了?(作介词宾语,置介词 后,不能用who取代。)

三、疑问代词用于对介词宾语提问时,过去的文体中介词和疑问代词通常一起放在句首,现代英语中,疑问代词在句首,介词在句未,例如:
For what do most people live and work?大部分人生活和工作的目的是什么?(旧文体)
What are you looking for?你在找什么?(现代英语)

四、疑问代词还可引导名词性从句,例如:
I can't make out what he is driving at.
我不知道他用意何在。
Can you tell me whose is the blue shirt on the bed?
你能告诉我床上的蓝衬衣是谁的吗?
Much of what you say I agree with, but I cannot go all the way with you.
你说的我大部分同意,但并不完全赞同。


疑问代词用法:
1. 疑问代词有who, whom, whose, which和what, 都是用来构成疑问句的:
Who is calling? 谁打电话来?
Whom do you want to speak to? 你想找谁接电话?
作主语时用who,作宾语时用whom,在口语中用who作宾语时也不少:
Who did you mean? 你指的是谁?
Who are you talking about? 你们在讲谁?
直接跟在介词后时只能用whom:
With whom did you come? 你和谁一道来的?
(口语中说“Who did you come with?时更多一些。)

2. 其他三个疑问代词可用作:
1)主语:
What’s your address? 你的地址怎样写?
Whose is better? 谁的好一些?
Which of these is yours? 哪一本是你的?
2)宾语:
What do you mean? 你是什么意思?
Which do you like better? 哪一个你更喜欢一些?
Whose have you chosen? 你选了谁的?
3)表语:
What’s her name? 她叫什么名字?
Whose is it? 这是谁的?
4)定语(这样用时有些字典标作形容词):
What time does the train leave? 这列火车什么时候离开?
Which room shall we stay in? 我们住哪间房?
Whose passport is this? 这是谁的护照?
实意动词:
即行为动词,表示动作的动词。实义动词与系动词是相对的,能独立用作谓语。
它分为及物动词和不及物动词两种:
及物动词是指后面要求有直接宾语的动词;
不及物动词指后面不需要跟宾语的动词。

实意动词使用方法:
及物动词
后面必须跟宾语意义才完整的实义动词,叫做及物动词(transitive verb)。如:
I believe that the committee will consider our suggestion.我相信委员会将会考虑我们的建议。
“How long can I keep the book ?”Harry asked.哈里问:“这本书我可以借多久?”
Dr. Bethune set us a good example. 白求恩大夫给我们树立了好榜样。
Crude oil contains many useful substances.原油含有许多有用的物质。

不及物动词
本身意义完整后面不须跟宾语的实义动词,叫做不及物动词(intransitive verb)。如:
Birds fly.鸟会飞。
It happened in June 1932.这件事发生于一九三二年六月。
My watch stopped.我的表停了。
She spoke at the meeting yesterday evening. 她在昨天晚上的会上发了言。

兼作及物动词和不及物动词
英语里有不少实义动词可以兼作及物动词和不及物动词。这样的动词又有两种不同的情况
a)兼作及物动词和不及物动词时,意义不变。试比较:
Shall I begin at once?我可以立刻开始吗?(begin作不及物动词)
She began working as a librarian after she left school.她毕业后当图书馆管理员。(began作及物动词)
When did they leave Chicago?他们是什么时候离开芝加哥的?(leave 作及物动词)
They left last week. 他们是上周离开的。(left 作不及物动词)
b)兼作及物动词和不及物动词时,有时意义不尽相同。如:
Wash your hands before meals.饭前要洗手。
Does this cloth wash well? 这布经得起洗吗?


英汉实意动词用法比较:
与汉语的比较,有时英语动词的及物和不及物的用法,与汉语的用法不一样,请注意下列两种情况:
a)有的动词在英语里只能用作不及物动词,而汉语则可用作及物动词,如arrive到达,agree同意,listen听。英语里这些动词后面常接介词。如:
We arrived at the railway station at noon.
我们于中午到达火车站。(at不能省去)
(比较:We reached the railway station at noon.)
Everybody listened to the lecture with great interest.
每个人都很有兴趣地听讲课。(to不可省去)
(比较:We all heard the lecture.)
Do they agree to the plan?他们同意这个计划吗?(to不可省去)

b)有的动词在英语里能用作及物动词,而在汉语里则不能用作及物动词,如serve为…服务。
Our children are taught to serve the people wholeheartedly.
我们的儿童被教以全心全意为人民服务
用于be动词之后,实义动词之前。

 实意动词的用法:
肯定句:
主语+动词过去式+其它
否定句:
主语+助动词didn‘t+动词原型+其他
一般过去式:
Did+主语+动词原型+其他


现在完成时:
过去发生并且已经完成的动作对现在造成影响或后果,过去某一时间开始并一直持续到现在的动作或状态。
基本结构:主语+have/has+动词的过去分词
句式:
1. 否定句式:现在完成时的否定句式是“haven't (hasn't)+过去分词...”。
如:I have not seen the movie yet. 我还没看这部电影。
2. 一般疑问句:Have(Has)+主语+过去分词...? 如:
—Have you finished the work?你已经做完这项工作了吗?
—Yes, I have. 是的,我已经做完了。(No, I haven't. 不,我还没有做完。)
3. 特殊疑问句:特殊疑问词+have(has)+主语+过去分词...?如:
How many times have you been to the Great Wall?你去过长城几次?
提示:肯定句中有some, already时,改为否定句或疑问句时通常要分别改为any, yet。如:
I have already finished my homework. 我已经完成了我的作业。
→ I haven't finished my homework yet. (否定句)
→ Have you finished your homework yet? (一般疑问句)
现在完成时常见两种句型:
①for短语
②It is+一段时间+ since从句
现在完成时特点:
1. 非持续性动词的完成时的肯定式不能与时间段连用,若要用时间段状语,则应换成相应的持续性动词或状态动词。
例如:
He has left.
He has been away for an hour.
2. have/has been to 表示曾经去过某地,但现在不在那;have/has gone to表示现在已去某地,现在不在这。
例如:
He has been to Canada, but now he is working in our company.
Mr. Li in not at home. He has gone to Shanghai.
3. 完成时的肯定式常用already,而否定式和疑问式常用yet,但若already用于疑问句时,表示一种出乎意外的惊讶。
例如:Have you read it already?
现在完成时和一般过去时区别:
现在完成时和一般过去时都表示在过去完成的动作。
但现在完成时强调的是这一动作与现在的关系。如对现在产生的结果或影响等,
而一般过去时只表示动作在过去某一时刻发生,不表示和现在的关系。
比较:
I have lost my new book.  我把新书丢了。(现在还未找到)
I lost my new book yesterday. 我昨天把新书丢了。(昨天丢的,现在找到与否没说明)

have been(to)与have gone( to)的区别:
have been(to)表示“去过某地(现在已经回来了)”,可用于各人称;
have gone(to)表示“去某地了(说话时某人不在当地)”,常用于第三人称,
前者可与once ,never,several times等连用,后者则不能。
如:
They have been to Beijing twice.他们去过北京两次。
He has gone to Beijing .  他去北京了。

现在完成时注意事项:
1.如单纯表示一段时间,或强调一段时间,虽有since一词,也不必用完成时。如:
It is two years since his father died. =His father has been dead for two years.他父亲去世已有三年了。

2.终止性动词现在完成时的否定式,已变成一种可以延续的状态,因此可以和表示一段时间的状语连用。如:
I haven't left here since 1997.自从1997年以来,我一直没有离开过这儿。

3..现在完成时不能单独与准确时间连用,(如表示过去的时间状语)
如:yesterday(morning、afternoon),last(morning、afternoon)等,除非与for,since连用.

4.不能与when连用.

现在完成时的用法:
1.表示动作发生在过去某个不确定的时间,但对现在留下了某种影响和结果。常被just、already、yet 等副词修饰。如:
-Have you had lunch yet?    
-Yes,I have. I've just had it.
2.表示从过去某一时刻开始一直持续到现在的动作或状态。这个动作可能刚停止,可能仍然在进行。
常带有for和since等表示一段时间的状语。如:
He has taught here since 1981
他自1981年就在这儿教书。(可能还要继续教)
I have't seen her for four years.
我有四年没见到她了。
3.表示说话前发生过一次或多次的动作,现在成为一种经验,一般译为汉语“过”。
常与twice,ever,never,three times等时间状语。 如:
I have been to Beijing twice.我去过北京

4. 现在完成时还往往可以同包括现在时间在内的时间状语连用,如:
now,up to these few days/weeks/months/years,this morning/week/month/year,just,today,up to present,so far等:
Peter has written six papers so far.
Man has now learned to release energy from the nucleus of the atom.
There has been too much rain in San Francisco this year.
The friendly relations and cooperation between our two countries have been enhanced in the past few years.
Up to the present everything has been successful.

5.现在完成时往往同表示不确定的过去时间状语连用,如:
already(肯定),yet(否定,疑问),just,before,recently,still,lately,never等:
He has already obtained a scholarship.
I haven't seen much of him recently (lately).
We have seen that film before.
Have they found the missing child yet?

6.现在完成时的"完成用法"
现在完成时的"完成用法"指的是动作发生在过去某一时刻并已结束,但该动作对现在产生了影响,与现在情况具有因果关系。
例如:
He has turned off the light.他已把灯关了。(动作结束于过去,但说明的是现在的情况--灯现在不亮了。)
现在完成时"完成用法"的特点是动作不延续,因此:
该时态只能与表示不定的过去时间状语(如:already,yet,before,recently等)、频度时间状语(如:never,ever,once等)、包括现在时刻在内的时间状语(如:this morning / month /year...,today等)连用。
例如:Have you found your pen yet?你已找到你的钢笔了吗?
7.现在完成时的"未完成用法"
现在完成时的"未完成用法"指的是动作开始于过去某一时刻,一直延续到现在,或可能还要继续下去。
例如:
He has lived here since 1978.自从1978年以来,他一直住在这儿。
(动作起始于1978年,一直住到现在,可能还要继续住下去。)
I have been in the army for more than 5 years.我在部队已经呆了五年多了。
(动作开始于5年前,一直延续至今,有可能还要继续下去。)
此种用法的句中常需一个表示一段时间的状语(由since或for引导),或表示与现在时刻相连的时间状语(如:up to now,so far)等。
例如:
I have heard nothing from him up to now.到目前为止我没有他的任何消息。
注意:现在完成时的未完成用法只适用于延续性动词,不可用于终止性动词,即瞬间完成或延续时间很短的动词。
如:come,go,arrive,leave,join,become,die等。
8.一段时间+has passed+since从句
主语+have / has been+since短语
例如:He has been in the League for three years.
或It is three years since he joined the League. 他入团已三年了  
9. 现在完成时常和短语 "up to now /till now","so far" (意思是从过去某一确定的时间一直延续到现在)连用。  
Up to/till now he's read many story books. 至今他已读过好多故事书。
I've been to New York three times so far. 至今我已到纽约去过三次。
has gone (to),has been (to),has been (in) 的区别
has gone to:去了没回
has been to :去过
has been in:呆了很久


从属连词:
这种连词是用以引导名词性从句定语从句和状语从句的,由从属连词所引导的句子叫从句,而含有从句的句子叫作复合句。

从属连词可分为三大类:
1、that (无词义,不做成分)
if,whether (表达是否的意义,但不做句子成分)
2、连接代词:who,whom,whose,what,which,whatever, whoever, whichever(有词义,在句子中可作主语、表语、宾语)
3、连接副词:when,where,why,how,how many,how long,how far,however,whenever,wherever (有词义,作从句的状语)

用法:
从结构上说,英语连接词分两大类:并列连词和从属连词。

并列连词连接两个或两个以上地位平等的字、词组或分句。例如:
(1) Air and water are indispensable to me.   
(2) She likes going out with friends or playing outdoor games.   
(3) Most workers have a good income, so they look very happy.   

从属连词连接两个或两个以上的分句,形成复杂句中的从属分句。例如:   
(4) He said that he did not want to go .   
(5) Many things have happened since I last saw him.   
(6) You may come if you want to.   

从属连词用来连接各种从句。
until(till)直到,在用until表达时间状语的句子中,主句中的动词是要十分小心去选择的。
如动词是持续行动词,它要用肯定句,如:
I studied hard until 12 o'clock last night.
如果动词是瞬间截止性动词,则要用否定句,如:
He didn't go to bed until his mother came back.
由since,for,by,before, 来引导的时间状语从句。
since 引导的时间状语是动作的开始时间,如:
I have studied English since 1990.
而by引导的时间状语通常是动作的结束时间,如:
I had learned 25 English songs by the end of last term.


从属连词语法分类:
种类 语法作用 连词举例 
从属连词 引导原因状语从句 Because, since
引导条件状语从句 If, unless, as long as
引导目的状语从句 So that
引导结果状语从句 So…that
引导方式状语从句 As, just as, as if
引导让步状语从句 Though, although, even
though, no matter what,
however, no matter how,
whoever, no matter who,
wherever, no matter where
引导比较状语从句 As…as, not so…as, than,
less…than, the more…the
more
引导名词性从句 Who, whom, whose, which,
that, when, where, why

一般疑问句:
是疑问句的一种。通常用yes,no来回答的疑问句叫做一般疑问句。口语中若无特殊含义,句末用升调。
其结构是:系动词be/助动词/情态动词+主语+其他成分? 
通常回答为:   
肯定:Yes+主语+提问的助动词   
否定:No+主语+提问的助动词+not 
例如:
Are you from Japan?   Yes, I am./No, I'm not.
Do you live near your school? Yes, I do./No, I don't. 
Can you speak French?  Yes, I can./No, I can't.
一般疑问句的特性:
1.将陈述句变为一般疑问句时,如句中有be 动词(am/ is/ are)时,可直接将它们提至主语前。
如主语为第一人称,应将其改为第二人称。如:
I'm in Class 2Grade 1. →Are you in Class 2Grade 1﹖
We're watching TV. →Are you watching TV﹖
2.陈述句中有情态动词(can、may、must …)时,也可直接将它们提至主语前,即可成为一般疑问句。如:
He can swim now. →Can he swim now﹖
The children may come with us. → May the children come with us﹖
3.陈述句中只有一个实义动词作谓语且其时态为一般现在时,变为一般疑问句时要在句首加do或does主语后的实义动词用原形。如:
I like these animals. →Do you like these animals﹖
She wants to go to the movies. → Does she want to go to the movies﹖
4.一般疑问句一般读升调(↑)
5.一般疑问句有时不用yes或 no 回答。如:
Are they in town now﹖
I think so.
May I sit here﹖
Certainly.
Does he like soccer﹖
Sorry I don't know.
6. 一般疑问句的第一单词总是虚词,读的时候要读轻声。
陈述句变为一般疑问句技巧:
根据一般疑问句不同的家族,可以用不同的方法将陈述句变为相应的一般疑问句。
1、第一家族:含be动词或情态动词的句子
秘诀:一调二改三问号
一调:即把句中的be或情态动词调到主语前;
二改:改换主语称谓,即将句中的主语Imy minesweourours等。第一人称分别改为相应的第二人称youyour yours等;
三问号:句末的句号改为问号。如:
Eg. I am an English teacher.    →    Are you an English teacher?
Eg. We can speak English fluently.   →    Can you speak English fluently?

2、第二家族:含行为动词(或称为实义动词)的句子
秘诀:一加二改三问号
一加:即在句首加助动词Do或Does;
二改:1、把谓语动词改为原形;2、改换主语称谓(同第一家组);
三问号:句末的句号改为问号。
Eg. We read English every morning. → Do you read English every morning?
Eg. Tom’s father listens to English on the radio every evening. →Does Tom’s father listen to English on the radio every evening?
特别注意:对于第二家族一定要注意动词的还原,因为时态与数的变化已经体现在助动词上了。

3、加强记忆口诀:
肯变一,并不难,can 或be提在前;
谓语若为行为动,do 或does句首用。
反义疑问句:
表示提问人的看法,没有把握,需要对方证实。
反意疑问句由两部分组成:前一部分是一个陈述句,后一部分是一个简短的疑问句,两部分的人称时态应保持一致。
1. 陈述部分肯定式+疑问部分否定式可记为前肯后否。 
2. 陈述部分否定式+疑问部分肯定式可记为前否后肯。
例如:This pencil is red, isn’t it? Yes, it is. / No, it isn’t. 
               This pencil isn’t red, is it? Yes, it is. / No, it isn’t.
速记:
前肯后否,前否后肯,前be后be,前无be后加助,时态一致。

反意疑问句的回答
前肯后否,前否后肯,根据事实从后往前翻译。如:
(1)They work hard,don’t they?他们努力工作,不是吗?
Yes, they do.对,他们工作努力。/No, they don't.不,他们工作不努力
(2)They don’t work hard, do they? 他们不太努力工作,是吗?
Yes, they do. 不,他们工作努力。/No, they don't. 是的, 他们工作不努力

否定反义疑问句的回答
当陈述部分为肯定式,反义疑问句为否定式时,其回答一般不会造成困难,一般只需照情况回答即可:
"It’s new, isn’t it?" "Yes, it is." “是新的,不是吗?”“是,是新的。”
"He wants to go, doesn’t he?" "No, he doesn’t." “他想去,不是吗?”“不,他不想去。”
此时,"Yes"即是,对前面"It's new."的肯定。

回答反义疑问句的原则
回答反意疑问句通常应根据实际情况来确定,
如有人问你You are asleep, aren’t you? 你应回答No, I’m not. 因为既然你能回答,肯定你还没有asleep。
但如果别人问你 You aren’t asleep, are you?(你还没有睡着,对吗),你也只能回答No, I’m not.(是的,还没有睡着),而不能回答为Yes, I’m not. 也不能回答成 Yes, I am.
“It is a beautiful flower,isn't it?” “It isn't a beautiful flower,is it?”
上述两句句子的回答肯定均为“Yes,it is."否定为“No,it isn't."
由上述例子可知,反义疑问句回答与句子本身所包含的中文肯定与否的含义并无太大关联,只需注意事实,肯定即用yes,否定用no,无需考虑句子原本是前否后肯或是前肯后否。

口诀:
反意疑问并不难,陈述疑问句中含。
前后肯否恰相反,否定词缀不能算。
主谓时态要一致,特殊情况记心田。
实际情况来回答,再把yes和no拣。
综上所述,反义疑问句回答就是按实际情况回答。
对反意疑问句的回答,无论问题的提法如何,如果事实是肯定的,就用yes,事实是否定的,就要用no。
要特别注意陈述句部分是否定结构,反意疑问句部分用肯定式提问时,回答yes或no与汉语正好相反。这种省略回答的yes要译成“不”,no要译成“是”。
例:
—He likes playing football, doesn’t he? 他喜欢踢足球,不是吗?
—Yes, he does. / No, he doesn’t. 是的。/ 不是。
—His sister didn’t attend the meeting, did she? 他妹妹没有参加会议,是吗?
—Yes, she did. / No, she didn’t. 不,她参加了。/ 是的,她没参加。


快速记忆表:
陈述部分的谓语   疑问部分
I/主语   aren't I / are I
no,nothing,nobody,never,few, seldom, hardly,rarely, little等否定含义的词   肯定含义
含有un-,in-.dis-,im-等否定意义的前缀构成的词语时,视为肯定含义   否定含义
ought to(肯定的)   shouldn't/ oughtn't +主语
have to+v.(had to+v.)   don't +主语(didn't +主语)
used to+v.   didn't +主语或 usedn't +主语
had better + v.   hadn't you
would rather + v.   wouldn't +主语
you'd like to + v.   wouldn't +主语
must   根据实际情况而定
感叹句   be +主语
指示代词或不定代词everything,that,nothing,this   主语用it
并列复合句   谓语根据邻近从句的谓语而定
定语从句,宾语从句主从复合句   根据主句的谓语而定
think,believe,expect,suppose,imagine等引导   与宾语从句相对应的从句
everybody,anyone,somebody,nobody,no one   复数they, 单数he
情态动词dare或need   need/needn't (dare/daren't ) +主语
dare, need 为实义动词   do/don't +主语
省去主语的祈使句   will/won't you?
Let's 开头的祈使句   Shall we?
Let us 开头的祈使句   Will you?
there be   相应的谓语动词+there(省略主语代词)
否定前缀不能视为否定词   仍用否定形式.
反意疑问句19条:
1) 陈述部分的主语是I,疑问部分要用 aren't I.
I'm as tall as your sister,aren't I?
2) 陈述部分的谓语是wish,疑问部分要用may +主语。
I wish to have a word with you, may I?
3) 陈述部分用 no, nothing, nobody, never, few, seldom, hardly, rarely, little等否定含义的词时,疑问部分用肯定含义。
The Swede made no answer, did he / she?
Some plants never blown (开花), do they ?
4) 含有ought to 的反意疑问句,陈述部分是肯定的,疑问部分用shouldn't / oughtn't +主语。
He ought to know what to do, oughtn't he? / shouldn't he?
5) 陈述部分有have to +v. (had to + v.),疑问部分常用don't +主语(didn't +主语)。
We have to get there at eight tomorrow, don't we?
6) 陈述部分的谓语是used to 时,疑问部分用didn't +主语或 usedn't +主语。
He used to take pictures there, didn't he? / usedn't he?
7) 陈述部分有had better + v. 疑问句部分用hadn't you?
You'd better read it by yourself, hadn't you?
8) 陈述部分有would rather +v.,疑问部分多用 wouldn't +主语。
He would rather read it ten times than recite it, wouldn't he?
9) 陈述部分有You'd like to +v. 疑问部分用wouldn't +主语。
You'd like to go with me, wouldn't you?
10) 陈述部分有must 的疑问句,疑问部分根据实际情况而定。
He must be a doctor, isn't he?
You must have studied English for three years, haven't you? / didn't you?
He must have finished it yesterday, didn't he?
11) 感叹句中,疑问部分用用否定的助动词加sb/sth?如:
1)What a fine day it is today!
What a fine day it is today,isn“t it?
2)How fast he runs!
How fast he runs,doesn”t he?
3)What a long time we have been waiting!
What a long time we have been waiting ,haven“t we?
12) 陈述部分由neither… nor, either… or 连接的并列主语时,疑问部分根据其实际逻辑意义而定。
Neither you nor I am engineer, are we?
13) 陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it。
Everything is ready, isn't it?
14)陈述部分为主语从句或并列复合句,疑问部分有三种情况:
a. 并列复合句疑问部分,谓语动词根据邻近从句的谓语而定。
Mr. Smith had been to Beijing for several times, he should have been in China now, shouldn't he?
b. 带有定语从句,宾语从句的主从复合句,疑问部分谓语根据主句的谓语而定:
He is not the man who gave us a talk, is he?
He said he wanted to visit Japan, didn't he?
c. 上述部分主句谓语是think, believe, expect, suppose, imagine等引导的定语从句,疑问部分与宾语从句相对应构成反意疑问句。
I don't think he is bright, is he?
We believe she can do it better, can't she?
15) 陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one等,疑问部分常用复数they,有时也用单数he。
Everyone knows the answer, don't they? (does he?)
Nobody knows about it, do they? (does he?)
16) 带情态动词dare或need的反意疑问句,疑问部分常用 need (dare ) +主语。
We need not do it again, need we ?
He dare not say so, dare you?
当dare, need 为实义动词时,疑问部分用助动词do + 主语。
She doesn't dare to go home alone, does she?
17) 省去主语的祈使句的反意疑问句,疑问部分用will you。
Don't do that again, will you?
Go with me, will you / won't you ?
注意: Let's 开头的祈使句,后用shall we?
Let us 开头的祈使句,后用will you?
Let's go and listen to the music, shall we?
Let us wait for you in the reading-room, will you ?
18) 陈述部分是"there be"结构的,疑问部分用there省略主语代词。
There is something wrong with your watch, isn't there?
There will not be any trouble, will there?
19) 否定前缀不能视为否定词,其反意疑问句仍用否定形式。
It is impossible, isn't it?
He is not unkind to his classmates, is he?
有些动词如:cost hurt hit put 等,它们的过去时与原型相同,在肯定句中一定要先弄清楚它们是什么时态.
英语18种特殊的反意疑问句:
1.祈使句。祈使句后一般加上will you或won't you构成反意疑问句,用will you 多表
示“请求”,用won't you 多表示提醒对方注意。例如:    
Look at the blackboard, will you/ won't you?看黑板,好吗?   
Let 引导的祈使句有两种情况:   
1) Let's...后的反意疑问句用shall we或shan't we。例如:   
Let's go home, shall we/ shan't we? 回家吧,好吗?    
还可以用may I来表示征求对方的同意或许可。   
2) Let us/me...后的反意疑问句用will you或won't you。例如:    
Let me have a try, will you/won't you? 让我试一试,行吗?   
2. 感叹句。感叹句后加反意疑问句时,其反意疑问句需用be的一般现在时态的否定形式。 例如:   
What fine weather, isn't it? 多好的天气啊,是吧?    
3. 当陈述部分谓语动词是need, dare, used to,且这些词被用作实义动词时,其反意疑问 句需用do的适当形式。例如:   
He needs help, doesn't he? 他需要帮助,是吗?    
4. 陈述部分主、谓语是I am...时,反意疑问句用aren't I 或am't I ,而不是am not I (可 用a m I not)。例如:   
I'm working now, am't I? 我在工作,是吗?   
5. 陈述部分的主语是everything, nothing, anything或something 时,反意疑问句的主语应用代词it。例如:    
Something is wrong with my radio, isn't it? 我的收音机出毛病了,是吧?   
6. 陈述部分的主语是 everybody, everyone, anybody, anyone, somebody, someone, nobody, no one, none, neither 时, 其反意疑问句的主语需用复数代词they。 例如:   
Everyone is here, aren't they? 大家都到了,是吗?   
No one knows about it, do they? 没有人知道这件事,对吗?   
7. 陈述部分的主语是指示代词this或that时,反意疑问句的主语用it,当陈述部分的主语是指示代词these或those时,其反意疑问句的主语用they。 例如:   
This is a plane, isn't it? 这是一架飞机,是吗?   
These are grapes,aren't they? 这些是葡萄,是吗?   
8. 陈述部分的主语是不定代词one时,反意疑问句的主语可以用one,也可用you(美式英语用he)。例如:   
One should be ready to help others, shouldn't one? 每个人都应该乐于助人,是吧?   
9. 当陈述部分含有以下这些含有否定意义的词时:few, little, seldom,hardly, never, not,  no, no one, nobody, nothing, none, neither等,其反意疑问句需用肯定结构。 例如:    
He is never late for school, is he? 他上学从不迟到,是吗?   
10. 当陈述部分所含的否定词是通过加前缀或后缀构成的,其后的反意疑问句依然用否定结构。例如:   
   It is unfair, isn't it? 这不公平,是吧?   
11.含有否定含义的词在陈述部分作动词的宾语时,其反意疑问句用肯定结构,也可以用否定结构。例如:   
You got nothing from him, did you? 你从他那儿什么也没得到,是吗?   
12. 当陈述部分主语是从句、不定式(短语)、动词-ing形式时,反意疑问句的主语应该用it。  例如:   
What you need is more important, isn't it?你需要的东西更重要,是吧?   
13. 当陈述部分含I think (believe, suppose...)that... 结构时,其反意疑问句须与从句的主、谓语保持一致,注意主句的主语必须是第一人称。例如:   
I don't think he will come, will he? 我认为他不会来,对吗?   
14.have(has)不是表示“有”的意思,并在句中做谓语时,其反意疑问句的助动词要用do, does, did。例如:   
They had a meeting just now,didn't they? 他们刚才开了个会,是吗?   
15. 陈述部分有have to 时,其反意疑问句要用助动词的否定形式。例如:   
You have to water the vegetables every day, don't you?你每天都要浇菜,对吧?   
16. 陈述部分是there be句型时,其反意疑问句中要用there。例如:   
There was a hospital here, wasn't there? 过去这儿有家医院,是吗?   
17. 陈述部分有had better时,反意疑问句中要用hadn't。 例如:   
We had better go to school at once, hadn't we? 我们现在最好马上去上学,好吗?
18. 当陈述部分含有情态动词must时,我们便要分析一下must的含义。如果must 作“一定;要;必须”讲,反意疑问句须用mustn't或needn't;
而当must作推测意义“一定 是;必定”讲时,反意疑问句则需根据must后的动词原形选用相应的形式。例如:    
He must work hard at physics, mustn't he? 他必须努力学物理,是吧?   
Tom must be at home,isn't he? 汤姆一定在家,是吧?
直接引语和间接引语:
引用别人的话有两种方式,一种是讲述别人的原话,并把它放在引号里,这叫直接引语;
另一种是用自己的话来转述别人,并且不能用引号,这就是间接引语。直接引语和间接引语之间可以互相转换。

直接引语和间接引语关系:
直接引语:直接引述别人的话(句子中有“”)。
间接引语:用自己的话转述别人的话,叫“间接引语”(句子中一般无“”) 
间接引语在大多数情况下是一个宾语从语。直接引语变成间接引语时,要注意以下几点:
人称变化、时态变化、宾语从句要用陈述句语序。
1.直接引语是陈述句,变成间接引语时,由连词that 引导。例如:
She said, "I am very happy to help you."→She said that she was very happy to help you.
2. 直接引语是一般(选择/反意)疑问句,变成间接引语时,由连词whether或if 引导。例如:
He asked me, "Do you like playing football?"→He asked me if/whether I liked playing football.
注意:大多数情况下,if和whether 可以互换,但后有or not,或在动词不定式前,或放在介词后作连接词时,一般只用whether。例如:
She asked me whether he could do it or not.
He hesitated about whether to drive or take the train.
3. 直接引语是特殊疑问句,变成间接引语时,由相应的疑问词who, whom, whose, how, when, why, where 等引导。例如:
My sister asked me, "How do you like the film?"→My sister asked me how I liked the film.
4. 直接引语是祈使句,变成间接引语时,把动词原形变成动词不定式,并在动词不定前加tell, ask, order 等的宾语。例如:
The captain ordered, "Be quiet."→The captain ordered us to be quiet.
注意:此种情况的否定句,在动词不定式前加not。
My teacher asked me, "Don't laugh."→My teacher asked me not to laugh.

 一些注意事项:
(1)如果直接引语是表示客观真理时,变为间接引语,一般现在时不改为一般过去时。如:
The teacher said "The earth goes round the sun."
→The teacher said that the earth goes round the sun.
(2)如果直接引语中有明确表示过时间的状语,变为间接引语时,一般过去时不改为过去完成时。如:
He said to me, "I was born in 1973."
→He told me that he was born in 1973.

(3)如果直接引语所述事实在当时和目前同样生效,变为间接宾语时,一般现在时不改为一般过去时。如:
He said, "I'm a boy, not a girl."
→He said that he is a boy ,not a girl.

(4)如果直接引语中的谓语动词表示一种反复出现或习惯动作,
在变为间接引时,一般现在时不改为一般过去时。如:
The girl said, "I get up at six every morning."
→The girl said that she gets up at six every morning.

(5)如果直接引语中含有since, when, while 引导的表示过去时间的状语从句,
在变为间接引语时,只改变主句中的谓语动词,从句的一般过去时则不变。如:
He said to me, "I have taught English since he came here ."
→He told me that he had taught English since he came here.

(6)如果直接引语中含有情态动词 must, need, had better以及情态动词的过去式could, might, should, would,
在变为间接引语时,这些情态动词没有时态的改变。例如:
The teacher said to me . "You must pay more attention to your pronunciation."
→The teacher told me that I must (have to ) pay more attention to my pronunciation.
He said , "I could swim when I was only six ."
→He said that he could swim when he was only six.
 
(7)间接引语一般要用陈述句的语序,即主、谓、宾的顺序。例如:
He asked Lucy, "Where did you go?"→He asked Lucy where she went.
Tom said, "What do you want, Ann?"→Tom asked Ann what she wanted.


直接引语变间接引语:
A.一般不表示请求或祈使的句子改为一个宾语从句
1.连词
若直接引语引号里的内容是陈述句,那么改为间接时,要用连词 that (可以省略)
……………….一般疑问句,…….,要用连词 if/whether (不可以省略)
……………….特殊疑问句,…….,要用连词 wh- 即特殊疑问词本身(不可省)
2.变化
(1)主句动词的变化
一般说来,主句谓语动词常为said或said to,变为间接引语时,当直接引语是陈述句时,said不变。
当直接引语是一般疑问句和特殊疑问句时,则要把said或said to变为asked / asked sb.
(2)从句人称的变化
由直接引语变间接引语时,从句的主语人称要遵循一主、二宾、三不变的原则。
①直接引语的主语是第一人称变为间接引语时要和主句的主语保持一致。
②如果直接引语的主语是第二人称变为间接引语时要与主句的宾语保持一致。
③如果直接引语的主语是第三人称变为间接引语时,人称不变。例如:
①They said, “We will go there by bus.” →They said they would go there by bus.
②She said to me, “Are you interested in science?” →She asked me if I was interested in science.
③His mother said to me, “He can't go to school.” →His mother told me that he couldn't go to school.
(3)、从句动词时态的变化
a. 如果主句的时态是一般过去时,从句的时态则应是与主句时态相应的过去时态。
①一般现在时→一般过去时;
②一般过去时→过去完成时;
③现在进行时→过去进行时;
④现在完成时→过去完成时;
⑤过去完成时→过去完成时(不变);
⑥一般将来时→过去将来时。例如:
The girl said, “I'm sorry for being late for class.” →The girl said that she was sorry for being late for class.
b. 直接引语变为间接引语时,如果主句中的谓语动词是一般现在时或一般将来时,则间接引语从句的时态保持不变。例如:
He says, “I have finished my homework.” →He says that he has finished his homework.
She will say, “I'll do it tomorrow.” →She will say that she'll do it the next day.
c. 直接引语如果是客观事实或真理,变为间接引语时,从句时态不变。例如:
The teacher said, “The earth moves around the sun.” →The teacher said that the earth moves around the sun.
(4)、指示代词、时间状语、地点状语和动词的变化
直接引语变为间接引语时,指示代词的变化为this→that, these→those等;
时间状语的变化为now→then, today→that day, yesterday→the day before, tomorrow→the next day等;
地点状语的变化为here→there;动词的变化为come→go(go 不要变come)。例如:
1. She said, “I will come this evening.” →She said that she would go that evening.
2. He said, “My sister was here three days ago, but she is not here now.” →He said that his sister had been there three days before, but she was not there then.

B.表示请求或祈使的句子改为句型tell/ask/order sb (not) to do sth
当直接引语引号里的内容表示要求时用tell sb (not) to do sth
当直接引语引号里的内容表示请求时用ask sb (not) to do sth
当直接引语引号里的内容表示强制要求时用order sb (not) to do sth
“It”用法及其句型和固定搭配,是英语语法的重点、难点,又是近几年考试的热点,因此在复习中应给予足够的重视。
It 句型归纳:
1. It is +adj.(+for sb./sth.) + to do sth.
用于此句型的形容词有:easy, hard, difficult,possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。如:
 It is necessary to change your job.
 It was very hard for them to walk such a long way in the snow.
2.It is +n.(+for sb./sth.) + to do sth.
用于此句型的名词有: pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。如:
 It is a pity for you to have missed such a wonderful play.
 It is bad manners for the young to take up the seats for the old.
3.It is +adj.+of sb.+to do sth.
此句型中的形容词主要描述某人的品德、特征。能用于该句型的形容词有: kind, nice, wise,
silly, polite, impolite, friendly, foolish, clever等。如:
 How silly it was of you to give up such a good chance!
 It is friendly of the family to try to make me feel at home in their house.
4.It is +adj.(+n.)+doing sth.
此句型中的形容词和名词常见的有:no/little use, no/much good, useless等。如:
 It’s no use crying over spilt milk.
5.It takes sb.+一段时间+to do sth. 表示“做某事花费某人多长时间”。如:
It took us half an hour to ride to the town by the sea.
6.It is +及物动词的过去分词+that从句
此句型中常见的及物动词的过去分词有:said, told, known, reported, recorded, thought, believed, considered等。如:
It is reported that the Russian President will visit China next week.
7.It +不及物动词+that从句
此句型中不及物动词常见的有:seem, happen, appear, matter等。如:
 It seems that there will be a heavy snow tomorrow.
 It happened that I met my good friends in the museum yesterday.
8.强调句型:It is+被强调部分+that/who从句
在使用强调句型时要注意,指人时可以用who或that,其它情况一律用that。如:
 It was under the bed that my brother hid the ball this morning.
 It is Mr Bell who/that often comes and looks after the old man.
9.It is/has been+一段时间+since从句。如:
It is /has been three years since we saw each other last.
10.It is (high) time that sb. did sth.
该句型表示“某人现在该做某事了”,从句常用过去时(虚拟语气)说明现在应该做的事情。如:
 It’s six o’clock.It is high time that we went home now.

It 常用的固定搭配:
1. make it
(1)在口语当中相当于succeed,表示:成功、做到、说定、赶上、及时到达
例  It's hard to make it to the top in show business.
(2)在口语中相当于fix the date for,表示“约定好时间”
例  —Shall we meet next week?
—OK. We just make it next Saturday.
2. as it is
(1)相当于in fact,in reality表示“事实上,实际情况是……”
例  We had planed to finish the task today,but as it is we probably won't finish it until next week.
(2)相当于方式状语从句,表示“照原样”
例  Leave the table as it is.
3. as it were
相当于as one might say,that is to say,表示“也就是说,可以说,换句话说”
例  He is,as it were,a modern Sherlock Holmes.
4. if it weren't for…/if it hadn't been for…
用来引导虚拟语气,相当于without,or but for,表示“如果不是……,要不是……”
例  If it weren't for Tom,I wouldn't be alive today.
5. that's it
(1)相当于That's all. That's so much. 表示“至此为止,没有别的了”
例  You can have one more sweet,and that's it.
(2)相当于 That's right.表示“对啦”
例  — I guess the key to the problem is thechoice “A”
—That's it.
6. catch it
在口语中,相当于be punished/scolded for doing sth. wrong. 表示“因做错事而挨骂,受责备,受批评,受惩罚”
例  We'll really catch it form our teacher if we're late for class again.
7. have it
(1)相当于say,insist表示“说,主张,表明,硬说”
例  Rumour has it that they are getting divorced.
(2)相当于get to know something,表示“了解,知道,获悉”
例  I had it from John that she was going abroad.
8. have what it takes
在口语中,相当于be well qualified for,表示“具有成功的条件”
例  You can take it from me that your daughter has what it takes to be a star.
9. so it seems / appears.
10. Keep at it!(Don't give up!)
相当于go on,表示“继续做,不放弃”
例  My teacher asked me to keep at it.
11. Go it!(Go on!)拼命干,莽撞
12. Now you have done it!(You have done sth. wrong.)
13. Now you'll catch it!(You'll be punished.)
14. As it happened,…
在口语中,相当于it's a pity that…,表示“真不凑巧,真遗憾”
例  As it happened,they were out.
15. As it turned out,…
在口语中,相当于it was found to be in the end,表示“最后被证明是”
例  As it turned out,his statement was false.
16. Such as it is(they are)
在口语中,相当于although it may not be worth much,表示“虽然没有多大价值”
例  You can borrow my exam notebook,such as it is.
17. Take it/things easy.
相当于Don't worry or don't hurry. 用来劝告别人,表示“不要慌,别担心,存住气”
例  Take it easy! He will do it well.
18. Take it from me.
在口语中,相当于believe me what I say.表示“请相信我的话,我敢担保”
例  You can take it from me that he will make it this time.
19. For what it is worth…
在口语中,相当于although I'm not sure it's of value,表示“不管其价值如何”
例  Here is the article I promise you,for what it's worth.
20. Worth it
在口语中,相当于useful,表示“有好处,值得做”
例  Don't hesitate about it! It's worth it.
21. Believe it or not.表示“信不信由你”
例  Believe it or not,Tom is getting married to Mary next Sunday.
22. Take it or leave it. v. 要么接受要么放弃
例  That is my last offer. You can take it or leave it.
23. It all depends/that all depends
在口语中,相当于it hasn't been decided yet,表示“那得看情况,还没有定下来”
例  —Are you going to the countryside for holiday?
—It/That all depends.
24. It's up to sb.
在口语中,相当于it's decided by sb. 表示“由……决定,由……负责,取决于……”
例  —Shall we go out for dinner?
—It's up to you.

it用法小结:
It用作实词
表达以下概念:
指代前文提到的事物,前文中的this, that;
替代前文中的内容;
指代一位性别不明的小孩或未知的人;
指代未指明但谈话双方都知道的那件事;
指代时间、天气、气候、距离等自然现象。

一、it 作人称代词的用法
1. 指事物
作为人称代词,it 可以除人以外的一切事物或动物。如:
I dropped my watch and it broke. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. 工作很辛苦,可是我乐意干。
“Where is the dog?” “It’s in the bedroom. ” “狗在哪?”“在卧室里”。
2. 指人
it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如:
Is it a boy or a girl? 是男孩还是女孩?
There is a knock on the door. It must be the postman. 有人在敲门,一定是邮递员。
【说明】在答语中,常用来指本人,如说 It’s me。
3. 代替某些代词
代词 it 还可用于代替指示代词this, that 以及复合不定代词 something, anything, nothing等。如:
“What’s this?” “It’s a new machine. ” “这是什么?”“是一种新机器”。
Nothing is wrong, is it? 没出什么问题,是吗?

二、it 作非人称代词的用法
1. 基本用法
it 作非人称代词的用法,主要用于指时间、距离、价值、天气、气候及温度等自然现象。如:
It’s too late to go there now. 现在去那儿已经太迟了。
It rained all day yesterday. 昨天下了一天的雨。
It can get very hot here. 这里有时会很热。
2. 用于某些句型
It’s time for sth. 该做某事了。
It’s time to do sth. 该做某事的时候了。
It’s time for sb to do sth. 某人该干某事了。
It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式,有时也用“should+动词原形”)
It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
It’s + 时间段 + since-从句. 自从……有一段时间了。
It’s + 时间段 + before-从句. 过多长的时间才……

三、it用作形式主语
1. 基本用法
当不定式、动名词、从句等复杂成分用作句子主语时,为保持句子平衡,通常把真正的主语放在句末,而在句首使用形式主语it。如:
It’s very important to remember this. 记住这一点很重要。
It’s hard work climbing mountains. 爬山是费劲的事。
It’s unknown when he will come. 他什么时候来还不知道。
2. 用作形式主语的的重要句型
(1) It + be + adj. for (of) sb to do sth 某人做某事……
It is hard for him to make up his mind. 他很难下定决心。
It was foolish of her to say such a thing. 她说那样的话,真是太蠢了。
【说明】介词 of 与 for 的区别是:
of 用于指某人的性格、属性、特征等,介词for表示对象,意为“对……来说” 。
(2) It takes sb + 时间段 + to do sth. 某人做某事花了……时间
It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。
【说明】此句型可以有以下多变种变体:It took me an hour to write the letter.
=The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时
(3) It is up to sb to do sth. 该由某人做某事
It’s up to you to to make the choice. 得由你来作选择。
(4) it look (seem, appear, happen, occur) that [as if]… 似乎……
It seemed as though he didn’t recognize me. 他似乎没认出我来。
It happened that I was out when he called. 他打电话时我碰巧不在家。
(5) If it were not for… / If it hadn’t been for… 若不是因为……
If it were not for their help, we couldn’t have got over the difficulties. 要不是他们帮助,这些困难我们不克服不了的。

四、it用作形式宾语
1. 基本用法
当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时,通常会在宾语补足语前使用形式宾语,而将真正的宾语移至句末。
其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如:
I find it difficult to do the job well. 我发现做好这件事不容易。
I think it best that you should stay here. 我认为你最好住这儿。
We think it no use complaining. 我们认为抱怨是没有用的。
2. 用作形式宾语的几个特殊结构
(1) 动词+ it + that-从句。如:
I like it that you came. 你来了,我很高兴。
I take it (that) he will come on time. 我认为他会准时来的。
You can put it that it was arranged before. 你可以说这是以前安排的。
Rumor has it that the defence minister will soon resign. 据传闻,国防部长不久就要辞职。
【说明】能用于此结构的动词不多,常见的有 have, take, put, like 等。
(2) 动词 + it + when (if)-从句。如:
I dislike it when you whistle. 我不爱听你吹口哨。
We really appreciate it when she offered to help. 她来帮忙了,我们十分感激。
I’d prefer it if I didn’t have to do so much work. 要是我不必做那么多工作,好就太好了。
【说明】能用于此结构的动词不多,常见的有 enjoy, hate, love, like, dislike, appreciate, prefer 等。
(3) 动词 + prep + it + that-从句。如:
See to it that you’re not late again. 注意千万不要再迟到。
Look to it that this doesn’t happen again. 注意不要再发生这种事。
You may rely on it that he’ll come to meet you. 你放心,他会来接你的。
I can’t answer for it that he will come. 我不能保证他会来。
【说明】能用于此结构的动词不多,常见的有see to, look to, insist on, stick to, depend on, answer for 等。
(4) 动词 + it + 介词短语+ that-从句。如:
I owe it to you that I am still alive. 多亏有你我才仍然活着。
I took it for granted that he would help us. 我认为他会帮助我们的。
【说明】能用于此结构的动词不多,常见的有take it for granted, bring it to sb’s attention, owe it to sb 等。

it在强调句中的使用
It is+被强调部分+that(who)+其他
在使用强调句型时需注意以下几点:
1. 请注意强调句型的特殊疑问句 
2. 在强调原因状语从句时,只能强调由because所引导的从句。
3. 在强调not … until结构时必须把not与until一起放到被强调的位置上。
4. 注意强调句型与定语从句的区别。
5. 不管被强调部分是单数还是复数,其前一律用It is / It was,而不能用They are / There were之类的。
6. 被强调部分是指人时,被强调部分后可用that / who,被强调部分指物时,被强调部分后只能用that。
7. 被强调部分是指时间或地点时,被强调部分后通常用that,一般不用when,where之类的。例:
It is I who am right. 是我对。
It was you that were wrong. 是你错了。
It was in the Japan that he died. 他是死于日本。
It was yesterday that he got married. 他是昨天结婚的。
It was a computer that he bought last week. 他上个星期买的是一台电脑。
Where was it that she lived? 她是住在什么地方?
When was it that he left for Japan? 他是什么时候离开去日本的?
Who is it that teaches you English? 是谁教你们英语?