定语从句，高一的复习要点！？

整理高一定语从句知识点。~

1、需要注意的问题
保持谓语和先行词的一致
e.g. He is one of the greatest writers who are living now.
e.g. He is the only one of the boys who has joined the army.
whose引导定语从句时，人、物皆可。
不能只看先行词，还要注意引导词在句子中充当什么成分。
避免关系词的重复，被关系代词说替代的部分不可在从句中重复出现。
e.g. This is the book we have read it together.
reason, way后关系词的用法
e.g. This is the reason (for which/ why/ that) he was absent yesterday.
e.g. I don’t like the way (in which/ that) he does everything.
在比较级中，than充当关系代词，在从句中作主语。
e.g. The results of his study have turned out to be more satisfactory than was expected.
2、使用that的几种情况
先行词前有形容词最高级或序数词修饰
先行词前有不定代词修饰，如the same, the only one, all, both, everything, nothing
当主句是以who, which开始的特殊疑问句时，从句用that，避免重复
先行词既指人，又指物
e.g. We know nothing about the doctors and the hospital that you are talking about.
关系代词充当表语
e.g. He is not the man that he used to be. = He is not what he used to be.
3、where引导的定语从句和地点状语从句
where引导的定语从句必须有先行词。如：place, school, city, house, room等
where不是修饰性名词，而是修饰其前整个句子，在句子中作地点状语。
e.g. Make a mark where you have any questions.
4、when, where, why引导的定语从句和同位语从句的区别
相同点：在两种从句中都可以充当状语成分
不同点：○1作关系副词引导定语从句时有跟它们含义相应的先行词
○2作关系副词引导定语从句时，可以改为“prep. + which”来引导
○3作连接副词引导同位语从句时没有与它们含义相应的先行词
e.g. I’ll never forget the day when (= on which) we met for the first time.
e.g. I have no idea when we met for the first time
在复合句中，修饰一个名词或代词的从句叫做定语从句；被定语从句所修饰的词叫先行词；定语从句必须放在先行词之后；引导定语从句的词叫关联词。

〔关联词〕
常见的关联词有关系代词that，which，who，whom，whose和关系副词where，when，why等。

〔种类〕

1．由that引导的定语从句

一般情况下that可指人或物，可以代替who，whom和which，在从句中作主语或谓语动词的宾语，但不能作介词的宾语。如：
The comrade that（who）is speaking at the meeting is an advanced worker．正在会上讲话的那个同志是个先进工人。
Is this the doctor that（whom）you talked about yesterday？这就是你们昨天谈论的那位医生吗？

The letter that（which）I received yesterday was from my father．昨天我收到的信是我父亲寄来的。

2．由who，whom和whose引导的定语从句

who在从句中作主语，whom在从句中作宾语，whose在从句中作定语。如：

This is the thief who stole my bike．这就是偷我自行车的那个贼。

He is the boy whom you wanted to find．他就是你想要找的那个男孩。

The girl whose mother is a doctor is waiting for you outside．妈妈是个医生的那个女孩在外面等你。

3．由which引导的定语从句

which指物，在从句中作主语或谓语动词的宾语。如：

The book which Mum bought me last week is called“Red Star Over China”．妈妈上周买给我的那本书名叫《西行漫记》。
The house which Lu Xun once lived in is now the Lu Xun Museum．鲁迅曾经住过的那所房子现在是鲁迅博物馆。
4．由where，when和why引导的定语从句
where在从句中作地点状语，when在从句中作时间状语，why在从句中作原因状语。如：
I will never forget the day when I joined the League．我永远忘不了我入团的那一天。
He will go back to the school where he studied next week．下周他要回到他曾经学习过的学校。
I don't know the reason why he quarreled with Zhang Lin．我不知道他同张琳吵架的原因。
定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
　　关系代词有：who, whom, whose, that, which等。
　　关系副词有： when, where, why等。
18.1 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：
　 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of which互换）, 例如：
　 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) cover is green.　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）

定语从句概要：
（这是有关定语从句的精要介绍，涵盖了有关定语从句的各个方面，供参考：）
引导定语从句的关联词包括关系代词和关系副词。关系代词有that, which, whose, who, whom, as；关系副词有when, where, why。关系代词和关系副词在定语从句中都充当一定的句法成份。关系代词在从句中充当动词的宾语时一般可以省略。
关系代词的选用比较复杂，受下列条件的制约：
(1) 要看先行词是指人还是指物，
(2) 要看关系代词在从句中句法功能，
(3) 要看定语从句是限定性的还是非限定性的。
在定语从句中充当的成分
↓ 用于限定性或非限定性从句 只用于限定性从句
指人 指物 指人或指物
主语 who which that
宾语 whom which that
谓语 whose whose (of which)
That 只能用在限定性定语从句中，而who, whom, which, which 既可用于限定性定语从句中，也可用于非限定性定语从句。
I know that he is a man who means what he says.
I know that he is a man that means what he says. 【我知道他是一个守信用的人。】
The gentleman whom she met addressed her with courtesy.
The gentleman that she met addressed her with courtesy. 【她遇到的那位先生很有礼貌地向她打了招呼。】
The gentleman she met addressed her with courtesy.（在从句中充当动词宾语的关系代词，可以省略。）
The watch which was lost has been found.
The watch that was lost has been found. 【丢了的表找到了。】
Here is the material which you need. (注：现代美语中不允许这样用)
Here is the material that you need.
Here is the material you need. 【你要的材料在这儿了。】
You are the only one whose advice he might listen to. 他也就是听你的话吧。
关系副词的选用相对来说比较简单，如果先行词是表示时间的名词，如time, day 等，则用when, 如先行词为表示地点的名词，如place, house, area 等等，则选用where。如果先行词为reason 则选用why
I will never forget the mountain village where I spent my childhood.
I will never forget the mountain village in which I spent my childhood.
我永远也不会忘记我度过童年的那个小山村。
I don’t know the reason why he did that.
I don’t know the reason for which he did that. 【我不知道他为什么这么做。】
当先行词是all, something, nothing 等不定代词时，或者先行词的前面有first, last, only, few, much, some, any, no 等词修饰时，或者先行词的前面有最高级修饰时，一般只用that 而不用which 来引导定语从句：
I have explained everything that I can to you.
I have explained everything I can to you. 【我已经尽一切可能把事情向你解释得一清二楚。】
This is the most beautiful campus that I have ever been to.
This is the most beautiful campus I have ever been to. 【这是我见到的最美丽的校园。】
That’s all that I know.
That’s all I know. 【我知道的就是这些。】
Can you tell me something that you know?
Can you tell something you know? 【你能把你知道的一些情况告诉我吗？】
There is nothing that I cannot tell you.
There is nothing I cannot tell you. 【我没有什么不能告诉你的事情。】
The first thing that we should do is to work out a plan.
The first thing we should do is to work out a plan. 【我们应该做的头一件事就是订一个计划。】
The last place that we visited was the farm.
The last place we visited was the farm. 【我们最后参观的地方是农场。】
还有一种定语从句，它的结构是：the same ….. as…, such … as
这里的as 可以指人或物，这里的as 引导的是限定性定语从句：
Such furniture as is very popular is expensive. 一种很受欢迎的家具价钱昂贵。
We have successfully done the same experiment as you did. 你做过的那个试验我们已经成功地做完了。
It wasn’t such a computer as the advertisement had promised. 这种电脑可不是广告中说的那种电脑。
限定性定语从句与主句关系密切，为句中不可缺少的部分，如去掉，主句意思就不完整了。而非限定性定语从句与主句关系松散，如果去掉了，主句内容仍然完整。在书面语中非限定性定语从句一般补逗号隔开。非限定性定语从句一般不用that 引导。引导非限定性定语从句的关系词不可省略。
His speech, which bored everyone, went on and on. 他的讲话没完没了，真让人烦。
The general’s daughter, whose name is Jane, gave me a sweet smile.
将军的女儿名叫珍妮。她冲我笑了笑，笑得好甜啊。
非限定性定语从句中，先行词也可以是整个句子，一般用which 或as 来引导定语从句，which在从句中可充当主语、宾语等，as 在从句中一般只充当主语，which 与as 引导这类定语从句的区别在于：which 只能放在句子当中或句子末尾，而as 的位置比较灵活，可以放在句子当中、句子末尾，也可以放在句首。
As is known to all, too much stress can cause disease.
Too much stress can cause disease, as is known to all.
Too much stress can cause disease, which is known to all. 【众所周知，压力太大了，人会得病的。】
Water consists of hydrogen and oxygen, which is known to all.
Water consists of hydrogen and oxygen, as is known to all. 【众所周知，水是由氢和氧组成的。】
关系代词在定语从句中有时也作介词的宾语。如果介词被置于关系代词前，一般只用介词加which 或介词加whom，而不用介词加that来引导定语从句。如果介词被置于从句句末，则可以使用that来代替which或whom，这时的that可以省略。
This is the ring on which she spent 1,000 dollars. 这就是她花了一千美元买的那枚戒指。
One of my colleagues whom you are familiar with will come today.
One of my colleagues that you are familiar with will come today.
One of my colleagues you are familiar with will come today.
我的一个同事，就是你非常熟悉的那个人，今天要过来。

定语从句及相关术语
1.定语从句：定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句，一般紧跟在它所修饰的先行词后面。
2.关系词：引导定语从句的关联词称为关系词，关系词有关系代词和关系副词。关系代词有that, which, who, whom, whose, as等；关系副词有where, when, why等。关系词常有3个作用：1，引导定语从句。2，代替先行词。3，在定语从句中担当一个成分。
注：关系代词有主语.宾语之分。一般whom作为宾语。
4.定语：定语用来限定、修饰名词或代词的，是对名词或代词起修饰、限定作用的词、短语或句子，汉语中常用‘……的’表示。主要由形容词担任。此外，名词，代词，数词，分词，副词，不定式以及介词短语也可以来担任，也可以由一个句子来担任．单词作定语时通常放在它所修饰的词之前，作前置定语。短语和从句作定语时则放在所修饰的词之后，作后置定语。
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（一） 限定性定语从句
一、关系代词
1. that既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在从句中作宾语也可以省略。[eg：this is the book （which）you want。]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，这些词包括当先行词是anything, everything, nothing , none等不定代词时，或者是由every, any, all, some, no, little, few, much等修饰时等，这时的that常被省略 还有先行词前有序数词或形容词最高级修饰时,或先行词就是序数词或最高级时.以及先行词中既有人又有物时.还有句中前面有which时,都只能用that
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
二、关系副词
关系副词=介词+关系代词
why=for which
where=in which
when=during which
whose=of which
1. where是关系副词，用来表示地点的定语从句
2. 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 business trip, he brings a lot of living necessities, such as towels, soap, toothbrush etc.
3. 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.它引导的从句可以修饰人和物, 当它引导的从句修饰物体时, 可以与 of which 调换,表达的意思一样.
4. 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
There is somebody here who wants to speak to you. 这里有人要和你说话。
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（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，通常是引导词和先行词之间用逗号隔开，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.当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。
3.非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。
4. 有时as也可用作关系代词
5. 在非限定性定语从句中，不能用关系副词why和关系代词that，而用who, whom代表人，用which,whose代表事物.；
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（三）关系代词引导的定语从句
1.who指人在从句中做主语
(1) The boys who are playing football are from Class One.
(2) 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。（注：who和whom已无太大区别，可以通用。）
(1) Mr. Liu is the person (whom) you talked about on the bus.
(2) Mr. Ling is just the boy whom I want to see.
(3) The man who/whom you met just now is my friend.
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。
如果在从句中做宾语,就用whom或who.比如: He is the man whom/who I talk to.
如果是在从句中作主语就只能用who.比如: He is the man who has an English book.
3.which指物，在定语从句中做主语或者宾语，做宾语时可省略
(1) Football is a game which is liked by most boys.
(2) This is the pen (which) he bought yesterday.
4. that指人时，相当于who或者whom；指物时，相当于which。
在定语从句中做主语或者宾语，做宾语时可省略。
(5) The number of the people that/who come to visit the city each year rises one million.
(6) Where is the man that/whom I saw this morning?
5. whose通常指人，也可指物，在定语从句中做定语
(1) He has a friend whose father is a doctor.
(2) I once lived in a house whose roof has fallen in.whose指物时，常用以下结构来代替
(3) The classroom whose door is broken will soon be repaired.
(4) The classroom the door of which is broken will soon be repaired.
(5) Do you like the book whose color is yellow?
(6) Do you like the book the color of which is yellow?
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（四）注意
介词+关系代词引导的定语从句关系代词在定语从句中做介词宾语时
从句常由介词+关系代词引导
(1) The school (that/which) he once studied in is very famous.
(2) The school in which he once studied is very famous.
(3) Tomorrow I will bring here a magazine (that/which) you asked for.
(4) Tomorrow I will bring here a magazine for which you asked.
(5) We’ll go to hear the famous singer (whom/that/who) we have often talked about.
(6) We’ll go to hear the famous singer about whom we have often talked.
注意：1. 含有介词的动词短语一般不拆开使用，如：look for, look after, take care of等
(1) This is the watch which/that I am looking for. (T＝正确)
(2) This is the watch for which I am looking. (F＝错误)
2. 若介词放在关系代词前，关系代词指人时用whom，不可用who或者that；指物时用which，不能用that；关系代词是所有格时用whose
(1) The man with whom you talked is my friend. (T)
(2) The man with that you talked is my friend. (F)
(3) The plane in which we flew to Canada is very comfortable. (T)
(4) The plane in that we flew in to Canada is very comfortable. (F)
3. “介词+关系代词”前可有some, any, none, both, all, neither, most, each, few等代词或者数词
(1) He loved his parents deeply, both of whom are very kind to him.
(2) In the basket there are quite many apples, some of which have gone bad.
(3) There are forty students in our class in all, most of whom are from big cities.
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（五）关系副词引导的定语从句
1. when指时间，在定语从句中做时间状语
(1) I still remember the day when I first came to the school.
(2) The time when we got together finally came.
2. where指地点，在定语从句中做地点状语
(1) Shanghai is the city where I was born.
(2) The house where I lived ten years ago has been pulled down.
3. why指原因，在定语从句中做原因状语
(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 in which./where I was born.
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（六）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。不及物动词后面无宾语，就必须要求用关系副词或者是介词加关系代词；而及物动词后接宾语，则要求用关系代词。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（注：先显示题，再显示答案，横线；用不同的颜色表示出。）
（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.
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。
方法二： 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 ago?
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.
在句1中，is后应跟表语，只有the one可以，而后面的you visited a few days ago则做one的定语从句。
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，先行词在从句中做主、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) 。
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（七）介词+关系词
1）介词后面的关系词不能省略。
2）that前不能有介词。
3） 某些在从句中充当时间，地点或原因状语的"介词+关系词"结构可以同关系副词when ,where和why 互换。 This is the house in which I lived two years ago.
This is the house where I lived two years ago.
Do you remember the day on which you joined our club?
Do you remember the day when you joined our club?
This is the reason why he came late.
This is the reason for which he came late.
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（八）先行词和关系词二合一
1)Whoever spits in public will be punished here. (Whoever 可以用 anyone who 代替) 2)The parents will use what they have to send their son to technical school. (what 可以用all that代替)
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（九）as,which引导的非限定性定语从句
由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。
As we know, smoking is harmful to one's health.
The sun heats the earth, which is very important to us.
典型例题
1）Alice received an invitation from her boss, ___came as a surprise.
A. it B. that C. which D. he
答案C. 此为非限定性从句，不能用 that修饰，而用which.，it 和he 都使后句成为句子，两个独立的句子不能单以逗号连接。况且选he句意不通。
2）The weather turned out to be very good, ___ was more than we could expect.
A. what B. which C. that D. it
答案B。
which可代替句子，用于非限定性定语从句，而what不可。That 不能用于非限定性定语从句，it不为连词，使由逗号连接的两个句子并在一起在英语语法上行不通。
3）It rained hard yesterday, ____ prevented me from going to the park..
A. that B. which C. as D. it
答案B.
as 和which在引导非限制性定语从句时，这两个关系代词都指主句所表达的整个意思，且在定语从句中都可以作主语和宾语。但不同之处主要有两点：
(1） as 引导的定语从句可置于句首，而which不可。
(2） as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用which.。
在本题中，prevent由于是行为动词，所以正确选项应为B。
As 的用法例
1. the same… as；such…as 中的as 是一种固定结构, 和……一样……。
I have got into the same trouble as he (has).
例2. as可引导非限制性从句，常带有'正如'。
As we know, smoking is harmful to one's health.
As is known, smoking is harmful to one's health.
As是关系代词。例1中的as作know的宾语；
例2中，它充当从句的主语，谓语动词know要用被动式。
一、“as / which” 特殊定语从句的先行成分
1. 形容词或形容词短语作先行成分, 具有形容词意义的介词短语也可以充当先行成分，如：
My grandmother’s house was always of great importance to me, as my own is.
在一定的语言环境里，有些名词可以具有形容词的性质。这些名词主要是那些表示人的身份、职业、状态的名词。值得一提的是，在这些具有形容词性质的名词之后，引导定语从句的关系代词不能用who / whom.
2. 动词短语先行成分
这种动词短语既可是限定形式也可是非限定形式。如果是动态动词短语，它们在从句中就一般有限定或非限定形式的替代动词do和as / which一起代替。do可以出现，也可以不出现，但不能用其它动词代替。
3. 句子作先行成分
这句子可以是整个主句也可以只是主句中的一个从句。有时是连续几个句子，有时甚至可以是一个完整的故事。
二、“as/which”特殊定语从句在句中的位置
由于先行成分的构成成分不同，“as/which”特殊定语从句在句中的位置有以下几种情况：
1. 形容词做先行成分时：形容词或形容词短语（含具有形容词性质的名词）作先行成分，“as / which”特殊定语从句置于先行成分之后。
2. 动词短语作先行成分时：动词短语作先行成分时，“as / which”特殊定语从句置于先行成分之后。但是，当从句中含有表示主观意志的插入成分时，“as”特殊定语从句可以移至句子之首。
3. 句子作先行成分时：“as”特殊定语从句的位置较灵活，可以置于先行成分之前、之中或之后。但如果先行成分是直接引语，“as”特殊定语从句多在先行成分之前。如果先行成分是否定句，“as”特殊定语从句与否定词的相对位置不同可以使它产生不同的意义。由于“as”特殊定语从句具有这一特点，所以有时它的位置不能随便移动。在非正式的文体里，“which”特殊定语从句可以出现在先行成分之中。
三、“as/which”特殊定语从句的语义功能
一般说来，as与which的语义功能相同，可以相互替换。但先行成分为句子时，它们的语义功能则有差异。
1. 表示结果
表示结果的特殊定语从句与其先行成分之间存在着一定的因果关系，从句中往往使用有结果意义的词，如动词result, make, enable, cause和形容词interesting, surprising, delightful, disgraceful等。
2. 表示评注
表示评注的特殊定语从句对其先行成分所述事实的正确性有肯定的倾向，它通常与那些表示客观事实，普遍真理或某种习性的先行成分连用；从句中则常用一些表示“合乎自然规律”、“众所周知”或“经常发生”等意义的词语，如natural, known to all, usual等。
3. 有无状语意义
“as”特殊定语从句具有状语意义（主要是方式状语意义），而“which”特殊定语从句则无状语意义。“as”特殊定语从句的状语意义要求它在语义上与其先行成分的语义保持一致，“which”特殊定语从句则不受这种限制。
四、关系代词as与which的句法功能
1. as / which 在特殊定语从句中作主语。
as作主语时，谓语动词常为连系动词（主要是be, seem），主语补语为usual、 a rule、 a matter of fact等时，系动词be习惯经常省略。行为动词作“as”特殊定语从句的谓语时一般用于被动语态（其中助动词be常略），不及物的行为动词在“as”特殊定语从句中作谓语的极少，常见的有happen一词。如：
Freddie, as might be expected, was attending the conference.
Which作主语时，谓语动词不限，主语被动皆可，只是谓语动词为被动语态时助动词be省略。
2. as和which都可以在特殊定语从句中宾语。
3. as和 which在特殊定语从句中作补语。如：
We thought him a gentleman, as/which he could never be.
“as”特殊定语从句中可以主谓倒装，“which”从句中则不能主谓倒装。
如果先行成分不是主语补语或宾语补语，关系代词用which而不用as。如：
He talked like a native, which/as he hardly was.
4. which在特殊从定语句中作定语。
which可以在特殊定语从句中作定语，修饰fact, matter, thing 等名词。这些名词代表先行成分表达的意义，有时将其略去句义仍然完整。as不能作定语。如：
I was told to go not by train but bus, which advice I followed.
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（十）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。
(错)The tree, that is four hundred years old, Is very famous here.
(b) 介词后不能用。
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,the same,the last,just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。
(f) 先行词指物，在主句中作表语时．
(g) 为了避免重复．
(h)先行词是the way时
举例：
Is this the book that you borrowed in the library?
这是你在图书馆借的那本书吗？
Who that break the window should be punished．
谁打碎了窗户都要受到惩罚．
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。

语法复习专题（12）
Unit12 定语从句

一、考点聚焦
1、功能：相当于形容词，修饰名词或代词，在句中作定语
2、位置：定语从句置于被修饰词之后
Those who are willing to attend the party, sign here please.
3、先行词：被定语从句修饰的词称为先行词
（1）先行词一般是名词和不定代词，如:some-, any-, every-和no与-boy, -thing的合成词；或all、none、any、some、that、those等代词。数词也可以作先行词，人称代词也同样可作先行词。
（2）先行词与关系词是等量关系。必须注意两点：
①先行词在从句中作主语时，从句谓语动词的数由先行词而定。
This is the place which is worth visiting.
②关系词在从句句子中充当了成分，其意思就是先行词的意义，所以在从句中不能重复其意。
There are many places we can visit（them）in China.
4、关系词：引导定语从句的都称关系词
关系代词：who, whom, which, that, whose, as。
关系副词：when, where, why。that偶尔也作关系副词。
5、确定关系词的步骤
（1）先找关系词，看先行词指的是什么。
（2）看关系词在从句中所充当的成分。
6、在定语从句中，当先行词指物时，下列情况的关系词宜用that而不用which
（1）先行词被①形容词最高级 ②序数词 ③数词几种词修饰或被 ④only、any、few、little、no、all、one of等修饰时。
（2）先行词为all、much、little、none、few、one、something、anything等不定代词时。
（3）先行词中既有人又有物时。
He was looking pleasantly at te children and parcels that filled his bus.
（4）先行词在主句中作表语关系词在从句中作表语时。
The village is no longer the one that was 5 years ago.
（5）当主句中含有疑问词which时。
Which are the books that you bought for me ?
7、宜用which而不用that的情况
（1）在非限制性定语从句中
（2）在关系词前有介词时
（3）当先行词本身是that时
（4）当关系词离先行词较远时
8、关系词who与that指人时，也有不同情况分别用不同的关系词
（1）当主句是there be句型时，关系词用who。
（2）先行词是为anyone、those、someone、everyone、one等词时，关系词用who。
（3）当主句是who作疑问词时，关系词用that。
Who is that girl that is standing by the window?
（4）whom在从句中只作宾语，可被who取代。
9、whose作关系词既指人又指物，在从句中作定语。如：
Do you know Mr.Smith whose story is very moving ?
There is a room, whose window faces the river.
There is a room, the window of which faces the river.
10、关系代词as,在从句中作主语、宾语和表语。
（1）先行词被such和the same修饰，或句型as many（much）中，从句都用as 引导。
Such books as you bought are useful.
The school is just the same as it was 10 years age.
注意：区别①such … that … 引导的结果状语从句。They are such
lovely children that we love them much.②the same … that … 引导定语从句。I want to use the same tool that you used just now.
（2）无先行词的定语从句用as和which引导。
区别：①意义上：as 含有“这点正如……一样”。②位置上：as 从句可置句首，也可在另处。
He didn’t pass the exam, as we had expected.
There is lots of air in loose snow, which can keep the cold out.
As is known, the earth is round, not flat.
11、关系副词when与where、why、that
when 指时间 = in / at / on / during which
where指地点 = in / at / from / which
why指原因 = for which
当先行词为way、day、reason、time时，可用that作关系副词。（非正式场合）
I don’t like the way that / in which / he talks.
当time作先行词时，关系词可以省掉。
This is the first time I have given you a lesson in French.
12、必须注意的问题
（1）关系词作主语时，从句中谓语的数。
（2）注意区别定语从句与强调句。
①定语从句中关系词作从句成分，复合句。
②强调it无意义，that / who不是引导词。
③强调it is / was和that / who后如果句子意思讲得通则是强调句，讲不通则不是。
It is the museum that / which we visited last year.(定语从句)
It was in the hotel that we stayed last night.（强调句）
（3）定语从句与同位语从句的区别。
①定语从句引导词被称为关系词，that充当主语、宾语、表语。有时可省略。
②同位语从句引导词被叫做连词，that不能充当任何成分，不可省。
Word came that their army was defeated.(同位语)
We expressed to them our wish that was the same as their.(定语)
（4）关系词在从句中省略的情况。
①关系词作宾语，前无介词时。
②关系词作表语。
（5）限制性定语从句与非限制性定语从句的翻译。
（6）关系词前有介词或复杂介词，关系词只能是which和whom。
（7）几个特殊的定语从句句型：
①He is the only one of the students who has got very good marks
in the match.（句中one为先行词）
He is one of the students who have got good marks in the match.（句中students为先行词）
②Is this place the one (that) we visited yesterday?
Is this the place(that / which)we visited yesterday ?
③He stood at the window, from where he could see what was happening.
④It may rain, in which case the match will be put off.
二、精典名题导解
选择填空
1. The film brought the hours back to me _________ I was taken good care of in that faraway village.（NMET 2001）
A.until B.that C.when D.where
解析：答案为C。本题考查分隔定语从句的关系词的选择。作好本题的关键是要能辨认出该定语从句的先行词the hours和关系词被介词短语to me所分隔。定语从句的先行词是表时间的名词hours, 并且关系词在从句中用作状语，故应选择表示时间的关系副词when。
2. ___________ is known to everybody, the noon travels around the earth once every month.(NMET 2001)
A.It B.As C.That D.What
解析：答案为B。本题考查as引导的非限制定语从句。as作“正如……”解时，引导的非限制性定语从句来修饰整个句子。当as在从句中作主语时，常用于下列短语：as is known、as is said、as is reported、as is announced等。要注意掌握作关系代词引导定语从句的用法。
3. After living in Pairs for fifty years he returned to the small town ___________ he grew up as a child.(NMET 1996)
A.which B.where C.that D.when
解析：答案为B。本题考查限制性定语从句中关系词的选择。定语从句的先行词是表示地点的名词短语the small town, 且关系词不作定语从句中的主语和宾语而作地点状语，因此定语从句必须用关系副词where引导。要注意分清先行词在从句中充当的成分，然后选择适当的关系词。

考试的重点通常是限制性和非限制性的用法区别，还有就是which和 that两个单词的区别和用法，重点看看这的笔记就行。

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笪迹兰悉： 语从句 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...

广西壮族自治区13784927118： 关于高一英语定语从句的用法及做题技巧 - ？
笪迹兰悉： 1、 定语从句在句中修饰某个名词或代词,被定语从句修饰的词叫先行词.定语从句需用下列关联词: 关系代词 关系副词 起连词作用,本身做从句的主语、宾语、表语或定语 起连词作用,本身在从句中作时间、地点或原因状语 who, whom, that,...

广西壮族自治区13784927118： 高一英语定语从句的重点讲解 - ？
笪迹兰悉： 定语从句概要: (这是有关定语从句的精要介绍,涵盖了有关定语从句的各个方面,供参考:) 引导定语从句的关联词包括关系代词和关系副词.关系代词有that, which, whose, who, whom, as;关系副词有when, where, why.关系代词和关系副...

广西壮族自治区13784927118： 高一如何学好定语从句我是高一学生?高一如何学好定语从句我是高一学 ？
笪迹兰悉： 你不要搞的那么升华,定语从句就是句子做定语而不是单词做定语了.就这么简单.当然有其一定的句型要求,无非就是一个引导词that which who等等.平时不懂的语法和问题多问问英语老师,或者同学,高一的语法还是比较重要的. 最简单的 I like the girl that/who is in red.我喜欢那个穿红衣服的女孩. 非限定的定语从句一定用which,不能用that/who等.有个逗号的就是非限定性定语从句(方便你理解)例句: The girl sings a song, which we think is very good. 简单的说就是这样了.再有不懂的可以随时来找我,我喜欢想进步的人.

广西壮族自治区13784927118： 高一英语定语从句的解题技巧和方法？
笪迹兰悉： 定语从句又称为关系从句,是最常见的从句之一.每年高考题对之均有考查,下面谈一谈定语从句在教学中几个值得注意的问题,供大家参考. 一、定语从句中关系代词与...

广西壮族自治区13784927118： 高中英语定语从句总结 各个方面 限定非限定 关系代词关系副词等等 越详细越好 当然 也不要太冗长 - ？
笪迹兰悉： 一、 定语从句与引导词 定语从句是在复合句中修饰某一名词或代词的从句.被修饰的名词或代词叫做选行词,而引导定语从句的词叫引导词,有关系代词和关系副词两类.懂得什么样的先行词后用什么样的引导词是学好定语从句的关键. 1.关...

广西壮族自治区13784927118： 定语从句重点 - ？
笪迹兰悉： 在定语从句中,关系代词或关系副词都代替先行词在从句中充当一定的成分,如果该从句中缺少主语、表语、宾语或定语,就要用关系代词来连接从句;如果从句中缺少状语,就得用关系副词来连接从句.例如:(1)I still remember the days ...