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that和which用法限定性定语从句

限定性定语从句、非限定性定语从句的区别（that和which用法）限定性定语从句,顾名思义,是对先行词从本质或特征上进行限制的一种定语从句,它所修饰的词代表一个(些)或一类特定的人或事、物。例如:

A man who doesn't learn from others can't achieve much.一个不向别人学习的人是不能有多少成就的。

A man被限定后,指一类特定的人.这类定语从句是不能去掉的,否则剩下的部分就失去意义不能成立,或者含义不清,甚至让人感到莫名其妙。非限定性定语从句则不然,它只对所修饰的词作进一步的说明,去掉之后并不影响句子的整个含义。在形式上,非限定性定语从句与主句之间通常用逗号隔开。例如:

Finally we visited to the Giant Yangtze Gorges Dam, which is the greatest key water control project in the world at present.最后我们参观了长江三峡大坝,它是目前世界上最大的水利枢纽工程。

本句若去掉从句,主句部分的含义仍然完整。

二、引导非限定性定语从句时,只能用which(不用that)。例如:

Heat is another form of energy, which is as important as other kinds of energy.热是另一种形式的能量,与其他形式的能量一样重要。

从句表补充说明,而且关系代词which不能换成that。

三、引导非限定性定语从句的which可以指代前面的先行词,也可以指前面整个句子的含义。例如:

That Peter will marry Alice, which has not been announced yet, has spread around.彼特要娶爱丽斯这件事还没宣布,却已传得沸沸扬扬。

句子中的which指"彼特要娶爱丽斯"这整个句子的意思。

四、除which外,还可用when, where, who等关系代、副词引导非限定性定语从句。例如:

After graduation, I decided to stay in Chongqing, where I spent my childhood and four years of college life.毕业后,我决定留在重庆,在那里我曾度过了我的童年和四年大学生活。

Albert Einstein left Germany for the United States during World War II, when Jews were badly treated in Germany.第二次世界大战期间,爱因斯坦离开德国去了美国,那时犹太人在德国受到不好的对待。

五、在限定性定语从句中作宾语时,引导词可以省略,但引导非限定性定语从句的关联词不能省。试比较:

He was eager to go to the hospital to see his stepmother, whom he loved and respected as his own mother.他急于想去医院看望他的继母,他把他的继母当作亲生母亲一样热爱和尊敬。

The American journalist (whom / who) the announcer mentioned in the news broadcast is said to have been

killed by the gangsters.播音员在新闻广播中提到的那位美国记者据说已经被匪徒杀害了。

两例中的关系代词都在从句中作宾语.由于第二例是限定性定语从句,可以省略关系代词;第一例中的引导词不能省略,因为它引导的是非限定性定语从句。

六、表示"正如"的含义时,通常用as引导非限定性定语从句,也可用which引导;但置于句首时,只能用as引导。

例如:

China has basically succeeded in defeating SARS, which / as we have expected.正如我们所预料的那样,中国已基本上战胜了"非典"。

As is well known to everybody, Taiwan is an inseparable part of China.众所周知,台湾是中国不可分割的一部分。

但是当非限定性定语从句是否定含义时,就只能用which(而不用as)引导。例如:

He didn't win the championship, which I hadn't expected.他没获得冠军,这一点是我没预料到的。

英语中定语从句的基本用法(一)

英语中定语从句的基本用法(一) 摘要]本文通过实例浅析了英语中定语从句的基本用法,如有不当之处,望大家批评指正。关键词]定语从句用法宾语主语英语,作为一门学科,每天有很多人在其中徜徉,可是也有很多人虽为它倾注了很多精力却依然觉得举首无措?的确,在英语中有很多的学问,需要我们去了解和掌握,下面就其中的某个方面——定语从句,通过实例,分析一下它的基本用法,和大家一起学习。在句子中用作定语的从句称为定语从句。定语从句通常位于它所修饰的名词或代词之后,这种名词或代词称为先行词。引导定语从句的关联词为关系代词和关系副词。关系代词在定语从句中可以用作主语、宾语、表语、介词宾语和定语等等;关系副词在定语从句中只用作状语。 I.由关系代词who,whom,whose,which,that引导的定语从句。 i.who代替人,在从句中作主语。 e.g.Amanwhodoesn’ttrytolearnfromotherscannot hopetoachievemuch. 一个不向别人学习的人是不能指望有多大成就的。 ii.whom代替人,在从句中作宾语,通常可以省略。 e.g.Theengineerwhomwemetyesterdayhaveworked outanewautomaticdevice. 我们昨天碰到的工程师研制出了一种新型的自动化装置。 iii.whose代替人或物,在从句中作定语。 e.g.MadamCurieisagreatscientistwhosenameis knownallovertheworld. 居里夫人是一位世界闻名的伟大科学家。Theyliveinthehousewhosedoorandwindowsareall broken. 他们住在一间门窗都已破败不堪的房子里。 iv.which代替物,在从句中作主语、宾语或介词宾语。作宾语时,通常可以省略。 e.g.Adirectcurrentisacurrentwhichflowsinone directiononly. 直流电是沿着一个方向流动的电流。Themusictowhichwelistenedlastnightwaswrittenby myfather. 我们昨晚欣赏的音乐是由我父亲写的。 v.that代替人或物。在从句中作主语或宾语,但不能作介词宾语。作宾语是通常可以省略。 e.g.HeistheonlyoneamongusthatknowsEnglish. 他是我们中间唯一懂英语的人。ThecarthatalmostcrashedintomebelongedtoBrown.

which,who引导的定语从句教案资料

which, who引导的定语从句看下面的几个例句： It successfully shows the rich culture which makes Beijing so famous. 它成功地展示了使北京闻名遐迩的悠久文化。 The photo which we liked best was taken by Zhao Min. 我们最喜欢的照片是赵敏照的先行词是物 It successfully shows the rich culture which makes Beijing so famous. 引导词在从句中作主语先行词是物 The photo which we liked best was taken by Zhao Min. 引导词在从句中作宾语由此，我们可以看出：which引导的定语从句修饰的是无生命的东西。which 在从句中的成分是可以作主语，也可以作宾语。下面我们再看一个句子：先行词是人 His father is the person who will be most unhappy. 引导词在从句中作主语由此，我们可以看出：如果先行词是人，那么定语从句的引导词就可以是who。注意：当who 在从句中作宾语时，在现代语法规则简化为大多数情况下都可用who了。如：Do you know Mr Zhang who(m) they like very much? 在先行词是物的定语从句中，一般情况下that和which都可以通用, 但在下列情况下, 一般用that而不用which。 (1)先行词为all, everything, nothing, something, anything, little, much 等不定代词时。 I am sure she has something that you can borrow. (2).先行词被all, little, much, every, no, 等修饰时。 I’ve read all the books that are not mine. (3)先行词被序数词或最高级修饰时。 This is the first book that he has read (4)先行词被the only, the very, the same, the last修饰时。 This is the very book that belongs to him. (5)先行词为人和物的组合。 They talked for an hour of things and persons that they remembered in the

where定语从句特殊用法

Where引导定语从句，先行词不一定都表示地点 1. We will discuss a number of cases __ beginners of English fail to use the language preperly. A.which B.as C.why D.where 2.He was driving so fast as to get himself into a dangerous situation ___he is likely to lose the control over his car. A.which B.as C.why D.where 两道题都选where ，但是case, situation 都不是地点，如何理解？在“先行词不是表示地点的名词”的前提下，如何判断是否使用关系副词where来引导定语从句的问题是一个高频考点。就是说，关系副词where所指代的先行词不只是表示地点的名词。用Where引导定语从句，先行词不一定都表示地点按照通常的理解，当where引导定语从句时，它的先行词就是表示地点的名词，但事实并不是我

们想象的那么简单。很多情况下，where所指代的先行词并不表示地点。请看以下几个例句： 1. Remember that the best relationship is one where your love for each other is greater than your need for each other. 请记住，最深的感情关系表现为彼此间的爱超过彼此间的需要。点评：这里where引导的定语从句修饰先行词one，也就是relationship (此处one指代的是relationship)。Relationship不是地点名词，但此处却用了where来引导，where在这里表示“在这样的感情关系下”。从定语从句的结构来看，定语从句不缺主语和宾语，引导词where在从句中充当的是状语。 2. Cheating is most likely in situations where the vital interests are high and the chances of getting caught are low. 欺诈行为在这种情况下最有可能发生：利益重大，而且欺诈行为被发现的可能性小。

定语从句中which和that用法

定语从句中which和that用法在定语从句中，which 和that 在指代事物时，一般可以互换使用，但并非在任何情况下都是这样。一、宜用that, 而不宜用which 的情况. ①先行词为不定代词all,much,something,everything,anything,nothing,none,the one 等 1. We should do all that is useful to the people. 2. There's nothing that can be said about it. 3. Do you mean the one that was bought yesterday ②先行词被only, any, few, little, no, just, very, one of等词修饰时。 1 .The only thing that we could do was to wait. 2 .That's the very word that is wrongly used. 3 .The last place (that) we visited was the chemical works. 4 .You can take any (=whichever) seat that is free. 5 .I hope the little that I can will be of some help to them. ③先行词是序数词时或被序数词修饰时。 1. When we talk about Wuxi, the first that comes into mind is Tai Lake. 2. This is the third film that has been shown in our school this term. ④先行词是最高级或被最高级修饰时。 1. This is the best that can be done now. 2. The most important thing that should be done right now is how to stop him from going on. ⑤先行词既有人又有物，用which和who都不适合，这时宜用that. 如： writer and his novel that you have just talked about is really well known . rider and his bike that had run over an old woman were held up by the police. ⑥被修饰词为数词时. 1. Yesterday I caught two fish and put them in a basin of water .Now you can see the two that are still alive .

定语从句及其引导词用法

一、基本概念：在复合句中，修饰某一名词或代词的从句叫定语从句。如： Do you know the man who spoke at the meeting just now? That is the house where he lived ten years ago. 定语从句所修饰的词叫先行词；定语从句一般用关系代词或关系副词来引导，关系词放在先行词与定语从句之间起连接作用，同时又作从句中的一个成分。引导定语从句的关系代词有：that, who, whom, whose, which; 关系副词有：when, where, why. 二、关系词的用法：（一）关系代词的用法： 1．作主语用who, which和that, 如： He is the man who/that lives next door. The train which/that has just left is for Shenzhen. 2．作宾语用whom, who, which, that, 如： The man (whom/who/that) we have just seen is a famous writer. Where is the book (which/that) I bought last week? 注：在非正式文体中，用于指人的关系代词who whom, that 通常可以省略，但在正式文体中通常用whom, 不可省略；用于指物的关系代词which和that 在非正式文体中也通常省略，但在正式文体中一般不省略。 3．作定语用whose, 如： (a) He is the man whose car was stolen last week. (b) It was a meeting whose importance I did not realize at that time. 注：“whose +名词中心词”这一结构在定语从句中既能作主语（如上a句），又能作宾语（如上b句）。whose 的先行词常用来指人，但有时也可以用来指具体事物或抽象概念，这时可以与of which 结构互换，词序是：“名词+of which”，如： They came to a house whose back wall had broken down.. (= the back wall of which) He’s written a book the name of which I’ve completely forgotten. (= whose name) 4．作表语只用that ，它既可以指人，也可以指物，但时常省略。如： He is no longer the man that he used to be. This is no longer the dirty place (that) it used to be. （二）关系副词的用法： 1．when 指时间，在从句中作时间状语，它的先行词通常有：time, day, morning, night, week, year 等。如： I still remember the time when I first became a college student. Do you know the date when Lincoln was born? 注：when时常可以省略，特别是在某些句型和某些时间状语中。如： Each time he came, he did his best to help us. But help never stopped coming from the day she fell ill. 2．where指地点，在从句中作地点状语。它的先行词通常有：place, spot, street, house, room,

which引导的定语从句

关于which引导从句的小结：关系代词which 一般指物，在定语从句中作主语、宾语或定语，既可引导限制性定语从句，又可引导非限制性定语从句。 1. 引导限制性定语从句 A shop should keep a stock of those goods which sell best. [ stock存货] 商店应存有最畅销的货物。 This is the family which is planning to move to the city 这是要搬进城里的一家。 2. 引导非限制性定语从句。（1 ）用来指代一个句子。 Internet is so interesting, which makes all possible happen. 因特网是如此有趣，它使任何事都有可能发生。（2 ）用来指代句子的一部分。 When deep in thought, which he often was, he would forget all around him. 他常常陷入沉思，这时他就会忘掉周围的一切。（3 ）如果要引导两个非限制性定语从句，第二个which 前要加and. He bought a book, which was written by LuXun, and which he decided to give to his friend. 他买了本鲁迅写的书，他决定送给朋友。

练习1. [1. board董事会 2. data资料,数据 3. shareholder 【英】股东 4. on behalf of代表 5. guard保护] The ability to guard customer data is the key to market value, which the board is responsible for on behalf of shareholders. which的先行词是谁？译文：保护客户资料的能力是市场价值的关键，董事会代表股东对市场价值负有责任。【难点小结：1.介词短语 2.which 的先行词 3. 非限制性定语从句有时要翻译成一句话】例2. 【1.semiconductor半导体 2. casualty伤亡，灭亡，覆灭 3.< A sit at the heart of B> A是B的核心】

定语从句特殊用法

定语从句中的特殊用法定语从句是起定语作用的,修饰,说明名词,代词或句子内容的从句,被定语从句修饰的词叫做先行词。引导定语从句，并在句中担任成分的词叫做关系代词或关系副词。定语从句是高考常考内容之一，使用时要尤其注意以下十种特殊用法。一、只用that不用which的情况 1、当先行词是all, little, few, much, something,everything, anything, nothing, none等不定代词时。如：Everything that happened then was like a nightmare.当时发生的一切就像是一场噩梦。 I will tell him all that you told me at the ball.我要把你在舞会上跟我说的话全都告诉他。 2、当先行词被only, any, few, little, no, all, just, very（恰好的,表示强调）等词修饰时。例如：The only thing that we could do was to wait.我们能做的只是等待。 That’sthe very thing that we can do.那正是我们能做的事。 3、当先行词是序数词、形容词最高级或先行词被序数词或形容词最高级修饰时。例如：The first place that we visited was the Great Wall.我们参观的第一个地方是长城。 This is the best novel that I have ever read.这是我看过的最好的小说。 4、被修饰词为数词时。例如： Yesterday I caught two fishes and put them in a basin of water. Now you can see the two that are still alive.昨天我捉到了两条鱼，把它们放在一盆水里。你可以看到那两条鱼还活着呢。 5、主句是There be结构，修饰其主语的定语从句宜用that作关系代词修饰物。例句：There’sstill a room that is free.还有一个空房间。

定语从句中that 和which的用法

定语从句中的that和which的用法引导定语从句的关系代词有：that（指人或物）,which （指物）,who (指人）.指人时可用that或who ；指物时可用that 或which 。 That和which在从句里都可以做宾语和主语，做宾语时可以省略。指物时，两者一般可以互换，但在下列情况下只能用that： 1）当先行词是all ,any ,anything ,everything ,nothing 或被它们修饰时.例如： Is there anything that I can do for you 有什么可以为你做的吗? All that can be done must be done . 凡是能做的都必须做. 2）当先行词被形容词的最高级或序数词修饰时.例如：That is one of the most interesting books that are sold in the bookshop . 那是这家书店出售的最有趣的书之一. The first thing that we should do is to get some food . 我们该做的第一件事是弄点吃的. 3）当先行词有：the only ,the very ,the same ,the last 等修饰时.例如：

My necklace is not the only thing that's missing . 我的项链不仅是丢掉的东西. 4）当主句以who或which开头时,定语从句中引导词用that ,不用which 或who .以避免重复.例如： Who is the girl that is wearing a red coat 正穿一件红色外套的女孩子是谁? 5）当先行词既有人又有物时,用that .例如： The writer and his novel that you have just talked about are really well known . 你刚才谈起的那位作家以及他的小说确实很著名. 请注意: 以下几种只能使用which的情况: 1.引导非限制性定语从句，用which。 2.在“介词＋关系代词”结构中，关系代词必须用which。如：The house in which we live is very large. 我们住的房子非常大。 This is the reference book of which the teacher is speaking. 这就是老师正在谈及的那本参考书。注意：如果介词不放在修饰事物的限定性定语从句的句首，which就可换为that，例如：This is the question which/that we've had so much discussion about. =This is the question about which we've had so much discussion.

定语从句的基本用法

定语从句的基本用法先请认真阅读下列各句，下列各句中的黑体部分均为该句所包含的定语从句： 1.This is the teacher who played basketball with us yesterday. 2.Tom is the boy whom they are looking for. 3.The house , which they built last year looks very new. 4.Physics is the most interesting subject that we learnt in the middle school. 从以上各句中我们可以看出定语从句是用来修饰它前面的名词或代词的，它起着修饰或限定作用。当然定语从句也可以用来修饰一个句子，在此我们不作讨论。定语从句分为限制性定语从句和非限制性定语从句。限制性定语从句所修饰的词是一个、一些或一类特定的人或事物，一般不能省略，拿掉后剩下的部分则没有意义，或者表述不清。非限制性定语从句则不然，它只对所修饰的词作进一步的说明，拿掉以后剩下的部分仍然可以成立，常常用逗号将其隔开。例如： This is the place where the Chinese Communist Party was founded. 此句中的定语从句是限制性定语从句。如果拿掉则This is the place.一句没有意义。 This message was left by Xiao Wang, who telephoned you just now. 此句中的定语从句是非限制性定语从句。如果拿掉则This message was left by Xiao Wang,一句仍有意义。被定语从句修饰的词叫做先行词，引导定语从句的词称为关系代词或关系副词。常见的关系代词和关系副词有who, whom,that,whose,which,where,when,why等。现在我们侧重讨论如何使用这些关系代词和关系副词。如果关系代词在从句中作主语时一般不能省略，而作宾语时一般可以省略。一，关系代词who, whom的用法。 1.who可以代替人（即它的先行词必须表示人），在从句中可以担任主语。也可以在从句中担任宾语，但是它的前面不能带介词，如果带介词则必须使用宾格whom。 whom在从句中只能担任宾语。例如： a)This is the teacher who often tells us interesting stories in class. b)Mary is the girl who/whom Tom wants to marry. c)Mrs White is a teacher whom every student likes. d)She is the girl with whom I will go to Shanghai tomorrow. 2.在定语从句中当先行词表示人时who和that是通用的。例如： a)Miss Green is the new teacher who/that teaches us spoken English. b)John’s father is an engineer who/that came to see him last Wednesday. 但在下列情况下则宜用who 而不用that。

英语语法：定语从句中的that和which

英语语法：定语从句中的that和which 英语语法：定语从句中的that和which That which代表物，区别听我来叙述; 先行若是不定代，that就把which 踹; 当先行词为anything，everything，nothing，all，any，much，many，one等不定代词时，只能使用“that”,不用“which”。例：Is there anything that I can do for you? 我能给你做点什么吗? 先行词前有两数，就用that定无误; 当先行词是基数词或序数词修饰时，只能使用“that”，不用“which”。例句： That is the second time that I have been to Japan. 那是我去日本的第二次。 The two buildings that lay on the River Thames fell down last week. 坐落在泰晤士河岸边的那两座大楼上星期倒塌了。先行词前最高级，还用that必无疑; 当先行词是形容词最高级或被形容词最高级修饰时，只能使用“that”,不用“which”。例句：This is the most wonderful time that I have ever had. 这是我度过的最美好的时光。句中若有there be, that应把which替; 例：There is no evidence that animals possess a mysterious sixth-sense allowing them to pre dict natural disasters. 说动物拥有神秘的第六感，可以预知自然灾害，这是没有根据的。先行主中做表语，避免重复从句里; 例句：1)This is not the hospital that it used to be.

定语从句中用Which的几种情况

定语从句中用Which的几种情况 Abstract :Generally, when talking about the differences between “that”and “which”in the Attributive Clauses, teachers like to emphasize the uses of “that”. So most students are familiar with them and know how to use “that”.But many of th e students don’t know the relative pronoun “which” also has many uses .In the past few years, “which”appeared more frequently in NMET than “that”.So in this article , the author mainly show us when to use “which” and give a complete conclusion of “which”. Key words: which 定语从句指代物指代人通常，在讲定语从句关系代词“that”与“which”的区别时，老师喜欢强调“that”的用法，大部分学生对其比较熟悉，也知道如何使用“that”。然而，关系代词“which”的用法同样比较多。它既可以指物，也可以指人（这一点可能许多同学不太熟悉和了解）：既可以引导限制性定语从句，也可以引导非限制性定语从句。近几年来，高考对“which”的考查越来越多。请看下面几个高考题： 1 . The factory produces half a million pairs of shoes every year, 80%_______ are sold abroad . (2004年辽宁卷, 答案:A .which指代物) A. of which B. which of C. of them D. of that 2 . The journey around the world took the sailor nine months ,________ the sailing time was 226 days .(2004年广西卷,答案A . which 指代物) A. of which B. during which C. from which D. for which 3 . Frank’s dream was to have his own shop ______ to produce the workings of his owm hands. (2005年湖南卷答案：B which 指代物) A. that B. in which C. by which D. on which 4 . The English play _______my students acted at the New Year’s party was great success .(200 5 年全国I卷答案:C which指代物) A. for which B. at which C. in which D. on which 5 . Her sister has become a lawyer , _______ she wanted to be . ( 2005年湖北卷答案D which指代人) A. who B. that C. what D. which 因此，掌握“which”在何种情况下使用是非常有必要的。那么，“which”到底有那些用法呢？笔者在多年的教学实践中将“which”的用法进行了较全面的总结。现将其一些较特殊的和不常见的用法予以展示, 希望可对各位同仁和英语爱好者有所帮助。一、先行词表物时下列情况只用which;不能用that： 1、在定语从句中,当关系代词紧跟介词,作介词宾语时 Eg：①.The table under which the boy crawled was put up for aution. 男孩在下面爬的那张桌子被拿去拍卖了。 ②.Light is the fast thing in the world , the speed of which is 300,000 kilometers per second. 世界上光的速度是最快的,其速度是每秒三十万公里。 ③.He once participated the investigation the result of which will be soon published. 他参加了结果不久就将公布的那项调查。另外，还可以在不定式作定语的结构中作介词宾语。此时不定式短语相当于一个定语从句。 Eg : ①. The key with which to open the door has been lost. 开这扇门的钥匙不见了。

定语从句之关系副词用法和特殊用法及专项练习

定语从句三 (关系副词的用法) 一．关系副词引导的定语从句 1. when指______，在定语从句中做________。 (1) I still remember the day when I first came to the school. (2) The time when we got together finally came. 2. where指_______，在定语从句中做_________。 (1) Shanghai is the city where I was born. (2) The house where I lived ten years ago has been pulled down. 3. why指_______，在定语从句中做________。、 (1) Please tell me the reason why you missed the plane. (2) I don’t know the reason why he looks unhappy today. 注意：关系副词引导的从句可以由“介词＋关系代词”引导的从句替换 (1) The reason why/ for which he refused the invitation is not clear, (2) From the year when/in which he was going to school he began to know what he wanted when he grew up. (3) Great changes have taken place in the city where/in which I was born. 二．关系代词和关系副词的区别 1. 取决于从句中的谓语动词。不及物动词后面无宾语，就必须用关系副词或介词+关系代词；及物动词后接宾语，就要求用关系代词。 ~ 2. 要看他们在从句中充当什么成分而定，即先行词在从句中是作主语、宾语还是作状语而定。 (1) This is the mountain village where I stayed last year. (2) I’ll never forget the days when I worked together with you. (3) I’ll never forget the days (which) I spent in the countryside. 【专项练习3】用关系代词、关系副词或介词+关系代词填空 1. I’ll never forget the days __________ we spent together in Paris. 2. I’ll remember the days __________ we stayed together in Paris. 3. This is the factory ____________ we visited last year. ) 4. This is the farm ____________ Lincoln once worked 5. The reason ___________ he missed the speech is that he forgot the time.

定语从句的基本用法1

A good student A developing country A developed country A 5-star friend A man named Chuck A language widely used 定语从句：修饰某一名词或代词的主谓结构(完整的基本句子结构-----五种句型)。 ↓↓ （主句之中）先行词关系词+其它成分 ↓ 在定语从句中必须担当一个成分。 ↓ 定语从句中缺啥就补啥定语从句(The Attributive Clause) ( (二)关系代词的作用 1. 关系代词：用来连接定语从句，并在从句中代表先行词的代词。先行词是物：which that 先行词是人：who that ※由who, whom, whose引导的定语从句。这类定语从句中who用作主语，whom作宾语，whose作定语。 e.g. This is the man who helped me. The doctor (whom) you are looking for is in the room. Do you know the man whose name is Wang Yu? ※在定语从句中，若先行词指人，其关系代词可用who, whom, 也可用that。 e.g. The girl who/that is speaking at the meeting is our monitor. The boy (who/whom/that) you saw just now is my brother. 3. 关系代词的具体用法及作用 1).who指人，在从句中做主语。如：The boys who are playing football are from Class One. Yesterday I helped an old man who lost his way. 2). whom指人，在定语从句中充当宾语，常可省略。如：Mr. Liu is the person (whom) you talked about on the bus. Mr. Ling is just the boy whom I want to see. 注意：关系代词whom在口语和非正式语体中常用who代替，可省略。如：The man who/whom you met just now is my friend. 3). which指物，在定语从句中做主语或宾语，做宾语时可省略

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that和which用法 限定性定语从句