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高中三年级英语

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  • 单选题
    -Is it height or weight ________ the interviewer should pay attention to?
    -Absolutely not.He will consider ________ important to be experienced.

    A.which;it
    B.that;it
    C.which;that
    D.that;that
    本题信息:2012年江苏模拟题英语单选题难度一般 来源:谢雪莲
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本试题 “-Is it height or weight ________ the interviewer should pay attention to?-Absolutely not.He will consider ________ important to be experienced.A...” 主要考查您对

关系代词

限制性定语从句

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。
  • 关系代词
  • 限制性定语从句
  • it的用法

关系代词的概念:

英语中的关系代词有who, whom, whose, that, which, 它们是用来引导定语从句的。关系代词既代表定语从句所修饰的词,又在其所引导的从句中承担一个成分,如主语、宾语、表语、或定语。
如:This is the man who saved your son. (who在从句中作主语,先行词是man) 
        The man whom I met yesterday is Jim.
        A child whose parents are dead is an orphan.
        He wants a room whose window looks out over the sea.


关系代词用法:

1、that与which的用法区别:
      两者都可指物,常可互换。其区别主要在于:
(1)引导非限制性定语从句时,通常要用which:
如:She received an invitation from her boss, which came as a surprise. 她收到了老板的邀请,这是她意想不到的。
(2)直接放在介词后作宾语时,通常要用which:
如:The tool with which he is working is called a hammer. 他干活用的那个工具叫做锤子。
(3)当先行词是下列不定代词或被它们修饰时much, little, none, all, few, every(thing), any(thing), no(thing)等时,通常用that:
如:There was little that the enemy could do but surrender. 敌人无法,只有投降了。
        All[Everything] that can be done must be done. 凡能做的事都必须做。
(4)当先行词有the very, the only, the same等修饰时,通常用that:
如:This is the only example that I know. 我知道的例子只有这一个。
        Those are the very words that he used. 那是他的原话。
(5)当先行词有形容词最高级或序数词(包括last, next等)等修饰时,通常用that:
如:This is the best dictionary that I've ever used. 这是我用过的最好的词典。
        The first thing that you should do is to work out a plan. 你应该做的第一件事是订个计划。 
(6)当关系代词在定语从句中用作表语时,通常用that:
如:China is not the country(that) it was. 中国已不是过去的中国了。
(7)当先行词是一个既指人又指物的并列词组时,通常用that:
如:They talked about the persons and things that most impressed them. 他们谈论了使他们印象最深的人和事。
(8)当要避免重复时:
如:Which is the course that we are to take? 我们选哪门课程?

2、that与who的用法区别:

(1)两者均可指人,有时可互换:
如:All that[who] heard him were delighted. 所有听了他讲话的人都很高兴。    
        Have you met anybody that[who] has been to Paris? 你遇见过到过巴黎的人吗?
        He is the only one among us that[who] knows Russian. 他是我们中间唯一懂俄语的人。
(2)但是在下列情况,通常要用that: 
   ①当先行词是一个既指人又指物的并列词组时: 
如:I made a speech on the men and things that I had seen abroad. 我就我在国外所见到的人和事作了报告。
   ②当先行词是who时(为避免重复):
如:Who was it that won the World Cup in1982? 谁赢得了1982年的世界杯?
   ③当关系代词在定语从句中作表语时(可省略):
如:Tom is not the boy(that) he was. 汤姆这孩子已不是以前那个样子了。


关系代词知识体系:

 


关系代词用法拓展:

1、as与which的用法区别
(1)引导限制性定语从句时,在such,as,thesame后只能用as,其他情况用which:
如:I never heard such stories as he tells. 我从未听过他讲那样的故事。
        It's the same story as I heard yesterday. 这故事跟我昨天听到的一样。
        This is the photo which shows my house. 这张照片拍的是我的住宅。
(2)引导非限制性定语从句时,有时两者可互换:
如:I live a long way from work, as [which] you know. 我住得离工作单位很远,这你是知道的。
(3)但在,在以下情况引导非限制性定语从句时,两者不可换用:
①当从句位于主句前面时,只用as:
如:As is known to everybody, the moon travels round the earth once every month. 月球每月绕地球转一周,这是每个人都清楚的。
②as引导的非限制性定语从句应与主句在意义上和谐一致,which无此限制:
如:He went abroad, as[which] was expected. 他出国了,这是大家预料到的。
        He went abroad, which was unexpected. 他出国了,这让大家感到很意外。(不用as)
③as引导非限制性定语从句时,先行词通常不能是主句中某个具体的词,而应是整个句子、整个短语或某个短语推断出来的概念,而which则无此限制:
如:The river, which flows through London, is called the Thames. 这条流经伦敦的河叫泰晤士河。(不用as)
④当as引导非限制性定语从句作主语时,其谓语通常应是连系动词,而不宜是其他动词,而which则无此限制:
如:She has married again, as[which] seemed natural. 她又结婚了,这似乎很自常。
        She has married again, which delighted us.她又结婚了,这使我们很高兴。(不用as)

2、who与whom的用法区别:
两者均只用于人,从理论上说,who为主格,whom为宾格:
如:Where's the girl who sells the tickets? 卖票的女孩在哪里?
        The author whom you criticized in your view has written a letter in reply. 你在评论中批评的那个作者已写了一封回信。
但实际上,除非在正式文体中,宾格关系代词whom往往省略不用,或用who或that代之:
如:The man(that, who, whom) you met just now is called Jim. 你刚遇见的那个人叫吉姆。
不过,在以下几种情况值得注意:
(1)直接跟在介词后面作宾语时,只能用whom,而且不能省略:
如:She brought with her three friends, none of whom I had ever met before. 她带了3个朋友来,我以前都没见过。
(2)引导非限制性定语从句且作宾语时,who和whom均可用,但以用whom为佳,此时也不能省略:
如:This is Jack, who[whom] you haven't met before. 这是杰克,你以前没见过。


限制性定语从句的概念:

限制性定语是指对被修饰名词或代词的必需修饰,是被修饰名词或代词不可缺少的修饰语,如果去掉它句子意思往往会不明确或会发生变化。
如:The travellers knowing about the floods took another road. 知道发大水的那些游客改道走了。
        The boys wanting to play football were disappointed when it rained. 想踢足球的那些男孩子因为下雨而感到失望。


关系代词引导的定语从句:

关系代词所代替的先行词是人或物的名词或代词,并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时,从句谓语动词的人称和数要和先行词保持一致。
1)who, whom, that 这些词代替的先行词是人的名词或代词,在从句中所起作用如下:
例:Is he the man who/that wants to see you? 他就是你想见的人吗?(who/that在从句中作主语)      
       He is the man whom/that I saw yesterday. 他就是我昨天见的那个人。(whom/that在从句中作宾语)
2)Whose用来指人或物,(只用作定语,若指物,它还可以同ofwhich互换)
例:They rushed over to help the man whose car had broken down. 那人车坏了,大家都跑过去帮忙。  
        Please pass me the book whose(of which) coverisgreen. 请递给我那本绿皮的书。
3)which, that 它们所代替的先行词是事物的名词或代词,在从句中可作主语、宾语等。
例如:A prosperity which/that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。(which/that在句中作宾语)
            The package(which/that) you are carrying is about to come unwrapped.你拿的包快散了。(which/that在句中作宾语)

关系副词引导的定语从句:

关系副词可代替的先行词是时间、地点或理由的名词,在从句中作状语。
1)when, where, why 关系副词when, where, why的含义相当于“介词+which”结构,因此常常和“介词+which”结构交替使用。
例如:There are occasions when(on which) one must yield.任何人都有不得不屈服的时候。
            Beijing is the place where(inwhich) I was born. 北京是我的出生地。
            Is this the reason why(for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗?
2)that代替关系副词 that可以用于表示时间、地点、方式、理由的名词后取代when, where, why和“介词+which”引导的定语从句,在口语中that常被省略,
例如:His father died the year(that/when/in which) he was born. 他父亲在他出生那年逝世了。
            He is unlikely to find the place(that/where/in which) he lived forty years ago. 他不大可能找到他四十年前居住过的地方。


限定性定语与非限定性定语的区别:

1、形式不同:
限定性定语从句主句和从句之间不用逗号隔开,口语中使用时也不停顿;而非限定性定语从句与主句之间通常有逗号隔开,口语中使用时有停顿。
2、功能不同:
 限定性定语从句用于对先行词的意义进行修饰、限制和识别,如果去掉,就会造成句意不完整或概念不清;而非限定性定语从句用于对先行词起补充说明作用,如果省略,句意仍然清楚、完整:
如:People who take physical exercise live longer. 进行体育锻炼的人活得长些。(若把从句去掉句子就失去意义)
        His daughter, who is in Boston now, is coming home next week. 他女儿现在在波士顿,下星期回来。(若把从句去句子意义仍然完整)
3、翻译不同:
在翻译定语从句时,一般把限定性定语从句翻译在它所修饰的先行词之前,而把非限定性定语从句与主句分开:
如:He is the man whose car was stolen. 他就是汽车被窃的那个人。
        I've invited Jim, who lives in the next flat. 我邀请了吉姆,他就住在隔壁。
4、含义不同:
如:I have a sister who is a doctor. 我有一个医生的姐姐。(姐姐不止一个)
        I have a sister, who is a doctor. 我有一个姐姐,她是当医生的。(只有一个姐姐)
5、先行词不同限定性定语从句的先行词只能是名词或代词,而非限定性定语从句的先行词则可以是名词或代词,也可以是短语或句子;
另外,当先行词为专有名词或其他具有独一无二性的普通名词时,通常要用非限制性定语从句,而不用限制性定语从句:
如:Peter drove too fast, which was dangerous. 彼得开车很快,这是很危险的。(which指drive too fast)
        He changed his mind, which made me very angry. 他改变了主意,这使我很生气。(which指整个主句)
        Mr.Smith, who is our boss, will leave for Japan next week. 我们的老板史密斯先生下周要去日本。(先行词为专有名词,要用非限制性定语从句修饰)  
        Her father, who has a lot of money, wishes her to study abroad. 她父亲很有钱,希望她出国学习。(先行词为表独一无二意义的普通名词,要用非限制性定语从句修饰)
6、关系词不同:
关系词that和why可用于限制性定语从句中,通常不用于非限制性定语从句;另外,在限制性定语从句中,关系词有时可以省略,而在非限制性定语从句中关系词一律不省略。


判断关系代词与关系副词方法:

一:用关系代词,还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语,就必须要求用关系代词;而不及物动词则要求用关系副词。
例如:This is the mountain village where I stayed last year.
            I'll never forget the days when I worked together with you.
判断改错
(错)This is the mountain village where I visited last year.
(错)I will never forget the days when I spent in the countryside.
(对)This is the mountain village(which) I visited last year.
(对)I'll never forget the days(which) I spent in the countryside.
注:习惯上总把表地点或时间的名词与关系副词where, when联系在一起。此两题错在关系词的误用上。
二:准确判断先行词在定语从句中的成分(主、谓、宾、定、状),也能正确选择出关系代词/关系副词。
例1. Is this museum ___ you visited a few days age?
        A. where 
        B. that
        C. on which
        D. the one
例2. Is this the museum ____ the exhibition was held.  
        A. where 
        B. that
        C.on which
        D. the one
答案:例1:D,例2:A
例1变为肯定句:This museum is___ you visited a few days ago.
例2变为肯定句:This is the museum ___ the exhibition was held.
注:在句1中,所缺部分为宾语,而where, that, on which都不能起到宾语的作用,只有the one既做了主句的表语,又可做从句的宾语,可以省略关系代词,所以应选D。
而句2中,主、谓、宾俱全,从句部分为句子的状语表地点,既可用副词where,又因in the museum词组,可用介词in+which引导地点状语。
而此题中,介词on用的不对,所以选A。关系词的选择依据在从句中所做的成分,先行词在从句中作主、定、宾语时,选择关系代词(who,whom,that,which,whose);
先行词在从句中做状语时,应选择关系副词(where地点状语,when时间状语,why原因状语)。


定语从句知识体系:

 


关系代词that的用法:

1)不用that的情况:
a)在引导非限定性定语从句时。
如:(错)The tree, that is four hundred years old, is very famous here.
b)介词后不能用:
如:We depend on the land from which we get our food.
        We depend on the land that/which we get our food from.
2)只能用that作为定语从句的关系代词的情况
a)在there be句型中,只用that,不用which。
b)在不定代词,如:anything, nothing, the one, all, much, few, any, little等作先行词时,只用that,不用which。
c)先行词有the only, the very修饰时,只用that。
d)先行词为序数词、数词、形容词最高级时,只用that。.
e)先行词既有人,又有物时。
例:All that is needed is a supply of oil.  所需的只是供油问题。  
        Finally, the thief handed everything that he had stolen to the police. 那贼最终把偷的全部东西交给了警察。


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.