定语从句中who与that,that与which的区别

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定语从句 that which who的区别

5、关系代词that和which的区别（1)相同点这两个关系代词引导定语从句时，都可以指物；在从句中都可作主语或宾语；作宾语时都可省略。

The train that ( which ) has just left is for Shanghai.刚开的那列火车是去上海的。

(作主语)The film that(which) we saw last night is wonderful.我们昨天晚上看的电影好极了。

(作宾语，可省略) （2）用that，不用which的情况①当先行词是不定代词或被它们修饰时。

all, everything, nothing, something, anything, little等不定代词时（something之后也可用which）。

To get the job started, all that I need is your permission.要开始工作，我所需要的是你的许可。

Is there anything that I can do for you?有什么要我做的事吗?He answered few questions that the teacher asked.他几乎没有回答老师的那些问题。

②当先行词被形容词最高级或序数词修饰时。

This was one of the most interesting books that were sold in this book store.这是这家书店售出的最有趣的书之一。

The first thing that should be done is to get some food.该做的第一件事是弄点吃的。

③当先行词有the very，the only，the same等修饰时。

That’s the only thing that we can do now.目前我们只能这样了。

Those are the very words that he used.那就是他的原话。

定语从句不用that的情况

定语从句不用that的情况定语从句不用that的情况定语从句中比较容易处理方面是，定语从句中“that”多可省略，表现为关系代词作宾语的情况，下面是店铺给大家整理的定语从句不用that的情况的相关内容，希望能给你带来帮助!（一）定语从句不用that的情况1、不能用that的情况介词前置时；非限定性定语从句中先行词本身是that多用who，不用that的情况先行词为anyone，one，ones时；先行词为those，he和people时；这些词代替指人，whom在定语从句中指人，"who"和“that”既可作主语又可作宾语（作宾语可以省略,who作宾语变为whom），that可以指人也可以指物, who不可指物。

在从句中所起作用如下：（1）Is he the man who/that wants to see you? 他是那个想见你的男人吗？（who/that在从句中作主语）（2）He is the man （whom/that） I saw yesterday. 他就是我昨天见到的那个人。

（whom/that在从句中作宾语）（3）The man whom you spoke to just now is our English teacher. 刚刚和你说话的那个男人是我们的英语老师。

（whom在从句中作宾语）注：who在定语从句中指人，作主语和宾语，作宾语时可省略；做及物动词或介词的宾语，可省略。

which，that 用来指物（有六种情况只可用that而不用which）(用作主语、宾语，作宾语时可以省略），例如：（1）The prosperity which/that had never appeared before took on in the countryside.农村出现了前所未有的繁荣。

（which/that在从句中作主语）（2）The package (which/that) you are carrying is about to comeunwrapped.你拿那个包裹快要散开了。

where,which,that,who,whose,what的用法.doc

where，which，that，who，whose，what的用法语法是小升初英语考试必考的内容，因此考生必须掌握好小升初英语语法知识点，为了帮助大家复习英语语法知识点，下面为大家带来小升初英语语法知识：where，which，that，who，whose，what的用法，希望大家认真记忆。

用来说明主句中某一名词或代词(有时也可说明整个主句或主句中一部分)而起定语作用的句子叫作定语从句。

一.词引导的定语从句1. 关系代词用来指代先行词是人或物的名词或代词句子成分用于限制从句或非限制性从句只用于限制性从句代替人代替物代替人或物主语Who which that主语Whom which that宾语Whose(=of whom) whose(=of which)例1：This is the detective who came from London.例2：The book which I am reading is written by Tomas Hardy.例3：The desk whose leg is broken is very old.例4：This is the room that Shakespeare was born in.2.关系代词的用法(1) 如果先行词是all, much, anything, something, nothing, everything, little, none等不定代词，关系代词一般只用that，不用which。

例如：All the people that are present burst into tears.(2) 如果先等词被形容词最高级以及first, last, any, only, few, mush, no, some, very等词修饰，关系代词常用that,不用which, who，或whom。

例如：(3) 非限制性定语从句中，不能用关系代词that,作宾语用的关系代词也不能省略。

定语从句that和which的区别

定语从句that和which的区别定语从句that和which的区别关于定语从句that和which大家了解过多少呢？可能很多人都不是很清楚，下面就是店铺分享的定语从句that和which的区别，一起来看一下吧。

定语从句that和which的区别1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，这里介绍宜用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.The last place (that) we visited was the chemical works.You can take any (=whichever) seat that is free.I hope the little that I can will be of some help to them.比较 *This is one of the best novels that were published last year.*This is the only one of the best novels that was published last year.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 thisterm.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：1.The writer and his novel that you have just talked about is really well known .2.The 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 .⑦如果有两个从句，其中一个关系代词已用which ，另一个关系代词宜用that，以避免语言的单调或重复.Edison built up a factory which produced things that had never been seen before.⑧疑问词是who或which，关系代词宜用that，以避免重复.1. Which is the book that you like best?2. Who is the man that is standing at the gate?⑨主句是There be 结构，修饰其主句的定语从句宜用that 作关系代词. 如：1. There is still a seat in the corner that is still free.⑩被修饰成分为表语时，或者关系代词本身是定语从句的表语时，该关系代词宜用that .1. That's a good book that will help you a lot.2. My home village is no longer the place ( that ) it used to be .定语从句中宜用which而不宜用that 的情况:①当关系代词的前面有介词时.1.A zoo is a park in which many kinds of animals are kept for exhibition.2.Is this the room in which Mr. White lives?②在非限制性定语从句中.1.Crusoe's dog， which was are now very old， became ill and died .2.More and more people are beginning to learn English，which is becoming very popular in our country. (which指代主句)③在一个句子中有两个定语从句，其中一个定语从句的关系代词用了that，另一个宜用which .1. Let me show you the novel，that I borrowed from the library which was newly open to us.2. At the station I bought some magazines that might help me to pass the time on the train and which I could pass on to others when I finished them.④当关系代词后面带有插入语时.1. Here's the English grammar which， as I have told you，will help improve your English.⑤先行词本身是that，宜用which .What's that which she is looking at?⑥先行词是those+复数名词.A shop should keep a stock of those goods which sell best. 定语从句that和which的区别21. 当先行词为all，much，little，none及由any，every，some， no所构成的复合不定代词时。

英语的三大从句语法讲解

英语三大从句在英语中，主要有三大从句，即名词性从句〔包括主语从句，宾语从句，表语从句，同位语从句〕、形容词性从句〔即定语从句〕、副词性从句〔即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等〕。

定语从句一、关系代词引导的定语从句关系代词代替前面的先行词，并且在定语从句中充当句子成分，可以作主语、宾语、定语等。

常见的关系代词有：who, that, which。

它们的主格、宾格和所有格如下表所示：〔一〕关系代词who, whom和 whose的用法who代替人，是主格，在定语从句中作主语。

An architect is a person who designs buildings. 建筑师是设计房屋的人。

whom代替人，是宾格，在定语从句作宾语，在非正式英语常可省略。

Do you know the gentleman whom we met in the school library yesterday? 昨天我们在学校图书馆里遇到的那位先生你认识吗？whose一般代替人，有时亦可代替物，是所有格，在定语从句作定语。

The girl student whose father is a senior engineer used to study abroad. 其父是一位高级工程师的那个女学生过去在国外留学。

Do you know the name of the hotel whose window we can see here? 我们这儿能看到窗户的那个宾馆叫什么名字，你知道吗？〔关系代词whose指代先行词hotel，正式用法应该用of which。

whose window=the window of which，意思是：the window of the hotel。

〕〔二〕关系代词which的用法which代替物，在定语从句作主语或宾语，作宾语时还可省略。

I do not like stories which have unhappy endings.我不喜欢有不幸结局的小说。

定语从句的关系代词选择

定语从句的关系代词选择定语从句是英语语法中常见的从句类型之一，用来修饰名词或代词，并进一步描述它们的特征、性质、状态等。

在定语从句中，选择适当的关系代词起着至关重要的作用。

本文将讨论定语从句中关系代词选择的准则和常见问题，并提供一些操作建议。

一、关系代词的选择准则1. 用作主语的关系代词：关系代词在定语从句中充当主语时，需根据定语从句所修饰的先行词的单复数来选择。

当先行词是单数时，应使用“that”或“which”；当先行词是复数时，应使用“who”、“whom”或“that”。

例子：- The student who/that sits next to me is very smart.- The books that/which are on the shelf belong to me.2. 用作宾语的关系代词：关系代词在定语从句中充当宾语时，需取决于先行词在定语从句中的作用。

a) 当先行词在定语从句中作动词的宾语时，需要使用“who”、“whom”或“that”。

其中，“that”在口语和非正式写作中常省略。

例子：- The girl who/whom/that I met yesterday is a doctor.b) 当先行词在定语从句中作介词的宾语时，需要使用“whom”或“that”。

也可以考虑将介词提前并使用关系代词“who”来避免“whom”的使用。

需要注意，当先行词是指物时，只能用“which”或“that”，不能用“who”或“whom”。

例子：- The novel about which/that I told you is very interesting.- The pen with which/that I wrote the letter is broken.3. 用作表语的关系代词：当关系代词在定语从句中充当表语时，需根据先行词的性质进行选择。

a) 当先行词为人时，使用“who”或“that”。

定语从句that和which以及who的用法实用

定语从句that和which以及who的用法实用定语从句是修饰名词的从句，常用的引导词有that、which和who。

它们的用法如下：1. that引导的定语从句：-用于修饰人或物，在从句中既可以作主语也可以作宾语。

-可用于限定性定语从句和非限定性定语从句。

-通常不用逗号与主句隔开。

限定性定语从句的例子：- The book that I bought yesterday is very interesting.- I have a friend that can speak five languages.非限定性定语从句的例子：- My brother, that lives in New York, is a lawyer.2. which引导的定语从句：-只用于修饰物，不能修饰人。

-通常用于非限定性定语从句。

-用逗号与主句隔开。

非限定性定语从句的例子：- I bought a new car, which is very fast.3. who引导的定语从句：-只用于修饰人。

-可用于限定性定语从句和非限定性定语从句。

-通常不用逗号与主句隔开，但在非限定性定语从句中使用逗号。

限定性定语从句的例子：- The girl who is sitting next to me is my sister.- We need to find a person who can speak French.非限定性定语从句的例子：- The CEO, who was born in Australia, speaks fluent Mandarin.。

定语从句(Ⅰ)——that,which,who和whose引导的定语从句

1、定语从句的定义在复合句中,修饰某一名词或代词用作定语的从句叫作定语从句。

被定语从句修饰的词叫先行词,定语从句必须放在先行词之后。

引导定语从句的关系词有关系代that,which,who,whom, whose和as以及关系副词when, where和why等。

关系代词在定语从句中可用作主语、宾语、定语等;关系副词在定语从句中作状语。

2、定语从句引导词的用法(1)that的用法that的先行词是人或物,在定语从句中作主语、宾语或表语。

主要特点有:①that在定语从句中作主语时不省略,作宾语时可以省略;②that不引导非限制性定语从句;③that前不加介词例子 Theforeigners that visited our school yesterday are from Canada.昨天参观我们学校的外国人来自加拿大。

(that代替人,作主语)I like the book very much ( that ) my uncle gaveme.我非常喜欢我叔叔给我的这本书。

(that代替物,作宾语)☆只能用that引导定语从句的情况:①先行词被序数词或形容词最高级修饰;②先行词是不定代词all, the one, everything等;③先行词被 any , the only , the last等修饰④先行词既指人又指物时例子Alice is the only person ( that ) I can trustin the office.爱丽丝是办公室里我唯一信任的人。

(先行词被the only修饰只用that)(2)which的用法先行词是物,在定语从句中作主主语或宾语。

主要特点:①which在定语从句中作主语时不能省略,作宾语时可以省略,引导非限制性定语从句时不能省略;②which的前面可以有介词;③which的先行词可以是前面数个的的句子,意为”这使…….;这一点……”。

例子 A computeris a machine which can do many things for us.电脑是一种可以为我们做许多事情的机器。

定语从句中who与that,that与which的区别

定语从句中that与who的用法区别1. 两者均可指人，有时可互换（包括当先行词为all, anyone, someone等，同时也包括先行词受the only等的修饰时）：All that [who] heard him were delighted.He is the only one among us that [who] knows Russian.Anyone who [that] is over sixteen is allowed in.It is impolite to turn your back on someone who [that] is speaking to you.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：I made a speech on the men and things that I had seen abroad.②当先行词是who时(为避免重复)：Who was it that won the World Cup in 1982?③当关系代词在定语从句中作表语时(可省略)：Tom is not the boy (that) he was.3. 但是在下列情况，通常要用who：当先行词为those 且指人时，英语习惯上要用who 来引导定语从句。

如：Those who do not wish to go need not go.Those who couldn’t walk were carried on stretchers. 那些不能走的人都用担架抬着。

It is said that those who eat the most are the least healthy. 据说吃得最多的人身体最差。

Only those who had booked in advance were allowed in. 只有那些预先订票的人可以进去。

定语从句关系代词thatwhichwhowhomwhose1定语从句关系代词那谁谁的1That

先行词关系词
定语从句
❖which/that 是关系代词，它在从句中代替先
行词the building, 同时担任从句中的主语，也
起连词系代词的使用取决于先行词，它们的关系非常密切，因为关系代词在定语从句中代替主句中的先行词，所以它在一般情况下都跟在先行词之后，而且它的人称、数必须和先行词一致。
注意: 固定动介词组不可分割,介词不能提前. 例如:look after,look at …
定语从句中需注意事项有些情况下只用关系词that,而不宜用which 1.从句所修饰的词又被形容词最高级或序数词修饰时
This is the most interesting story( that )I
The boy is Tom. He sits in front of me. The boy who sits in front of me is Tom.
The man is kind. Everyone likes him.
The man (who) everyone likes is kind.
2.I’ll never forget the day. I joined the League on that day.
I’ll never forget the day when I joined the League. I’ll never forget the day on which I joined the League .
have ever heard.
The first meeting( that) we will take part
in will be held in the afternoon. 2.先行词是 something, nothing, anything等不定代词时

定语从句口诀

定语从句顺口溜1.定从分类有奥妙, 限与非限看逗号;句前必有先行词，必是名词或代词；定从先行很紧密，代副两词拉关系；2.关系代词有六个，听我逐一来说破；which表物人用who,人物都有that顾；which用在逗号后，意表前句你要know;who做主语很称职，whom用到宾语里；3.that用法真有趣，两个地方它不去；逗号后边它不去，介词之后不考虑；4.That which代表物，区别听我来叙述；先行若是不定代，that就把which 踹；先行词前有两数，就用that定无误；先行词前最高级，还用that必无疑；句中若有there be, that应把which替；先行主中做表语，避免重复从句里；（Just the only very same last, 其后也要用that;）5.指人可用that who, 以下情况多用who; Those people做先行，There be的结构中；先行指人不定代，从中做主who要在；两个定从一起来，不要重复你有才；6.定从之中少定语，whose为你唱一曲；Whose指人又指物，所属关系要记住。

7.As/which在句末，若有否定as错；句首只能用as,还有认知猜想词；固定结构用as, the same /such/so/as;So /such …that宾不离，so/such…as宾要弃；8.关系代词到这里，主宾表定作用起；关系代词做宾语，省与不省全靠你；9.关系副词when/where/why, 从中做状莫懈怠；时间用when原因why,地点where经常在；关系副词可替换，介词加上关系代；关系代，关系代，that与who要除外；挑选介词要聪明，必看动词和先行；聪明反被聪明误，只因乱用关系副；关系副，关系副，定缺主宾它不住；它不住，它不住，关系代词来玩酷；10.只记上边不可以，特殊情况告诉你；先行用way 做状语, in which/ that /略可以；one of +复做先行，从中谓语复数明，one前若有only/very, 从中谓语定用单；定从名从可转换，all that被what换；定语从句顺口溜分段解析：1.定从分类有奥妙, 限与非限看逗号;定语从句分为两大类：限制性定语从句和非限制性定语从句，区分它们有两个标准：1）从内容上看，限制性定语从句与它所修饰的先行词关系紧密，不可去掉，去掉后意思就不完整了；非限制性定语从句只对先行词起补充说明的作用，去掉后不影响句子的完整性。

非常详细的定语从句,状语从句,名词从句的讲解……that,which,where,who,等

定语从句定语从句是由关系代词和关系副词引导的从句，其作用是作定语修饰主句的某个成分，定语从句分为限定性和非限定性从句两种。

状语从句分为时间状语从句，结果状语从句，让步状语从句，原因状语从句，条件状语从句以及行为方式状语从句。

名词从句包括主语从句，宾语从句，表语从句和同位语从句及there be句型。

一、限定性定语从句1. that即可代表事物也可代表人，which代表事物；它们在从句中作主语或宾语，that在从句中作宾语时常可省略关系词，which在从句中作宾语则不能省略。

而且，如果which在从句中作“不及物动词＋介词”的介词的宾语，注意介词不要丢掉，而且介词总是放在关系代词which的前边，但有的则放在它原来的位置2. which作宾语时，根据先行词与定语从句之间的语义关系，先行词与which之间的介词不能丢3. 代表物时多用which，但在带有下列词的句子中用that而不用which，这些词包括all, anything, much等，这时的that常被省略4. who和whom引导的从句用来修饰人，分别作从句中的主语和宾语，whom 作宾语时，要注意它可以作动词的宾语也可以作介词的宾语5. where是关系副词，用来表示地点的定语从句6. when引导定语从句表示时间〔注〕值得一提的是，表示时间“time"一词的定语从句只用when引导，有时不用任何关系代词，当然也不用that引导By the time you arrive in London, we will have stayed there for two weeks.I still remember the first time I met her.Each time he goes to besiness trip, he brings a lot of living necessities, such as towers, soap, toothbrush etc.7. whose是关系代词，修饰名词作定语，相当于所修饰成分的前置所有格8. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时，常用there is来引导二、非限定性定语从句：非限定性定语从句的作用是对所修饰的成分作进一步说明，通常和主句间用逗号隔开，将从句拿掉后其他部分仍可成立1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分2. 在引导限定性定语从句时，that有时相当于in which, at which, for which或at whichAttitudes towards daydreaming are changing in much the same way that(in which) attitudes towards night dreaming have changed. 人们对白日做梦的态度正在改变，这与人们对夜间做梦的看法的变化有非常相似之处。

定语从句(Ⅰ)——that,which,who和whose引导的定语从句

1、定语从句的定义在复合句中,修饰某一名词或代词用作定语的从句叫作定语从句。

被定语从句修饰的词叫先行词,定语从句必须放在先行词之后。

引导定语从句的关系词有关系代that,which,who,whom, whose和as以及关系副词when, where和why等。

关系代词在定语从句中可用作主语、宾语、定语等;关系副词在定语从句中作状语。

2、定语从句引导词的用法(1)that的用法that的先行词是人或物,在定语从句中作主语、宾语或表语。

(that代替人,作主语)I like the book very much ( that ) my uncle gaveme.我非常喜欢我叔叔给我的这本书。

(先行词被the only修饰只用that)(2)which的用法先行词是物,在定语从句中作主主语或宾语。

例子 A computeris a machine which can do many things for us.电脑是一种可以为我们做许多事情的机器。

that、which、who引导从句时的区分

一、that都可以引导什么从句？答：1、用作关系代词，引导定语从句The only thing that I can do is to have a rest . 我唯一能做的事就是休息。

2、用作关联词，引导名词性从句That the earth turns around the sun is known to all. 地球围着太阳转这一点是众所周知的。

（引导主语从句）It so happens that I know the man. 碰巧我认识那人。

（主语从句）I will see to it that everything is ready. 我会注意把一切准备妥当的。

(宾语从句)The trouble is that we are short of money.困难就在于我们缺钱。

（表语从句）There is no doubt that he is the best choice for this position. 无疑，他是这一职位的最佳人选。

（同位语从句）3、构成短语，引导状语从句Bring it nearer so that I may see it better .拿近一点，好让我看清楚些。

( so that 引导目的状语从句)She got up early , so that she caught the early bus. 她起的早，所以赶上了早班车。

( so that 引导结果状语从句)In order that everybody should hear him , he spoke loudly. 他大声说话，为了使大家都能听得见。

（in order that引导目的状语从句）Now that they have taken matters into their hands the pace of events has quickened.他们既然已着手自己来处理问题，事态的进展也就加快了。

定语从句的引导词与关系词的辨析

定语从句的引导词与关系词的辨析在英语语法中，定语从句是一种用来修饰名词或代词的从句结构。

而在定语从句中，引导词与关系词起着至关重要的作用，它们不仅连接主句与从句，还在从句中充当特定的语法角色。

然而，由于引导词与关系词存在着一定的差异，容易引起学习者的混淆。

本文将对定语从句的引导词与关系词进行详细的辨析和解释。

1. 引导词“that”与关系词“that”的用法区别引导词“that”用于引导定语从句时，可以在从句中做主语、宾语或表语，如:- The book that I bought is very interesting. （引导从句中的主语）- The girl that you met yesterday is my sister. （引导从句中的宾语）- This is the house that I used to live in. （引导从句中的表语）而关系词“that”用于连接主句与从句，起到引导从句的作用。

在这种情况下，关系词“that”在从句中不再充当特定的语法角色。

例如: - He told me that he would come tomorrow. （连接主句与从句）- I know that you like this song. （连接主句与从句）2. 引导词“which”与关系词“which”的用法区别引导词“which”用于引导非限制性定语从句时，可以在从句中做主语、宾语或表语，如:- The book, which is written by a famous author, is very interesting. （引导非限制性定语从句中的主语）- This is my car, which you borrowed last week. （引导非限制性定语从句中的宾语）- The house, which is newly built, is very beautiful. （引导非限制性定语从句中的表语）而关系词“which”用于连接主句与从句，起到引导从句的作用。

which、who和whose引导的定语从句,练习和答案,句子翻译

which、who引导的定语从句一、which引导的定语从句which在从句中做主语，也可做宾语，或介词的宾语，修饰表示物的先行词。

例如：The building which / that stands near the river is our school. (先行词在从句中作主语)The house (which / that) we live in is not large. (先行词在从句中作live in宾语)= The house where we live is not large. (先行词在从句中作live的状语)= The house in which we live is not large.(先行词在从句中作live的宾语，介词后面的which不能省略)小试牛刀：The school is very beautiful. I study in the school.This is the watch. He was looking for a watch.【2012•河南】Tony, tell me the result of the discussion_____ you had with your dad yesterday.A. whatB. whichC. whenD. who【2013•湖北】The place _______interested me most was the Children’s Palace.A. whichB. whereC. whatD. in which【2013•浙江】This is the hotel _______last month.A. at which they stayedB. at that they stayedC. where they stayed atD. that they stayed二、who、whom引导的定语从句1、who在从句中做主语(口语中也可做宾语)，修饰表示人的先行词。

定语从句which that 区别

that与which特定用法注意1 只宜于用which，不用that的情况。

(1)先行词为that，those时。

What’s that which is under the desk? 在桌子底下的那个是什么？(2)引导词（关系代词）前有介词时。

This is the room in which he lives. 这是他居住的房间。

注意2 只宜于用that，不用which的情况。

(1)先行词是形容词最高级或者它的前面有形容词最高级修饰时。

The film is the most interesting that I have ever seen. 这部电影是我看过的最有趣的一部。

English is the most difficult subject that you will learn during these years. 英语会是这些年你学的最难的科目。

(2)先行词是序数词或它的前面有last或序数词修饰时。

It’s t he first film that I saw this year. 这是我今年看的第一部电影。

Tom is always the first that comes to the classroom. Tom总是第一个到教室的人。

(3)主句以疑问词who，which开头时，不用which或who，以避免重复。

Which is the bike that you lost? 哪辆是你丢的自行车？(4)先行词既有人又有物时。

They are taiking about the sutdents and the school that they visited yesterday. 他们正在谈论昨天访问的学生和学校。

(5)先行词是all, much, little, something, everything, anything, nothing, none, the one等代词时。