高考英语语法专题复习：定语从句

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高考英语复习6.定语从句（语法）

高考英语复习6.定语从句（语法）语法讲座：定语从句一、先行词、关系代词和关系副词1．先行词(antecedent)就是被定语从句所修饰的名词。

在英语中，定语从句跟在被修饰词之后，所以被修饰词就是“先行”的词。

2．连接定语从句，要用关系代词(relative pronoun)和关系副词(relative adverb)。

关系代词和关系副词与连接词不完全相同，因为它们除了连接主句和定语从句，还在定语从句中代替一定的成分。

二、关系代词1．who先行词是“人”，在从句中代替主语。

注意：代替从句中的主语，who不能省略。

who的单复数由先行词决定。

但是要注意“one of +先行词”与“the only one of +先行词”的情况。

2．whom先行词是“人”，在从句中代替宾语。

whom在从句中经常可以省略，但如果在介词后面，则不能省。

3．which先行词是“物”，在从句中可以代替主语或宾语。

which代替主语时，不能省略，它的单复数由先行词决定。

which 代替宾语时则经常省略，但如果在介词后面，那么也不能省略。

which的先行词有时还可以是前面的整个句子，这时它总是看成单数，也不能省略。

4．that先行词可以是“人”，也可以是“物”，在从句中可以代替主语或者宾语。

that代替主语时，不能省略，代替宾语时则经常省略。

that不能用在介词之后。

在以下三种情况时，我们一般不用关系代词who, whom, 和which，而只用that：1）先行词是不定代词如anything, something, all等词，或由all, every, little, any, much, the very 等词所修饰；2）先行词前有最高级形容词或序数词所修饰；3）先行词是由and连接的两个词，分别指“人”和“物”。

5．whose先行词可以是“人”，也可以是“物”，在从句中代替定语。

whose不能省略。

如果先行词是“物”，我们也可以用sth. of which代替whose。

牛津译林版英语高考英语语法专题复习：定语从句归纳拓展讲解

牛津译林版英语高考英语语法专题复习：定语从句归纳拓展讲解语法专题一定语从句定语从句在句中作定语，修饰名词或代词。

被修饰的名词或者代词被称为先行词，定语从句一般放在先行词的后面。

引导定语从句的词被称为关系词，关系词有关系代词和关系副词，它们在先行词和定语从句之间起引导作用，在意义上代替先行词，在定语从句中充当一个成分。

其基本解题方法是：第一，找出先行词；第二，看先行词在定语从句中充当的成分，作主语、宾语、表语或定语时要用关系代词，如果作状语，则要选用关系副词；第三，看先行词是否为特殊词，然后根据需要选用合适的关系词。

考点一关系代词与关系副词的区别关系代词有who，whom，which，tha t和whose，另外，as 也可充当关系代词。

关系代词在定语从句中充当主语、宾语、表语和定语。

关系副词有when，where 和why，在定语从句中充当状语。

1．who 指人，在定语从句中作主语或宾语。

The boys who are playing football are from Class One.2．whom 指人，在定语从句中作宾语，常可省略。

Mr Liu is the person（wh o m）you talked about just now.3．which 指物，在定语从句中作主语或宾语，作宾语时常可省略。

The book which he gave me is very interesting.4．that 指人时，相当于who 或whom；指物时，相当于which。

在定语从句中作主语或宾语，作宾语时常可省略。

She is the pop star（that）I want to see very much.5．whose 可指人或物，修饰名词或代词，在定语从句中充当定语。

“whose＋名词”可改为“the＋名词＋of which/whom”或“ofwhich/whom the＋名词”。

The house whose windows are very large is my uncle's.＝The houseof which the windows are very large is my uncle's.6．as 可指人也可指物，在定语从句中作主语、宾语或表语。

高考英语语法专题：定语从句

3.This is the best film that I have ever read.
4.We talked about the persons and things that we remembered.
5.He is the only man that I want to see.
6.Who is the man that is making a speech?
高考英语语法专题：定语从句
I.定语从句起了形容词的作用，在句中修饰一个名词或代词。被修饰的词叫做先行词，引导定语从句的词叫关系词，他的作用一是放在先行词与定语从句中间起了连接作用，二是在从句中担当一个成分，并与先行词保持数的一致。
关系词
先行词
从句成分
例句
备注
关系代词
who
人
主语
Do you know the man who is talking with your mother?
Do you know the time when the class is over?你知道下课的时间吗？（定语从句）
It was already five o’clock when the class was over.
=When the class was over, it was already five o’clock.
可用on which
where
地点
地点状语
This is the house where I was born.
可用in which
why
原因
原因状语
I can’t imagine the reason why he turned down my offer.

高中英语语法复习专题讲解-定语从句

高中英语语法复习专题讲解-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。

高考英语语法复习——定语从句

高考英语语法复习之
定语从句
1 英语和汉语中定语从句有什么区别？
观察意义对等的英汉句子，找出句子的对应部分 People,A who take medicine to lose weight,B are
most likely to harm their health,C. 服用药物减肥的,a 人,b 很可能损害他们的健康,c。
“两定”：判定先行词与从句谓语动词的关系→ 确定关系代词或关系副词(兼顾人/物)。如先行词在从句中作主语，表语，宾语，定语(先行词与谓语动词无直接关系，先行词与其后的名词有所属关
3
系)，主补，或宾补，用关系代词；如先行词在从句中作状语，用关系副词；
“一证”：把定语从句还原成独立的句子，验证其句子结构的完整性。
【解析】先行词为the school，定语从句为I visited the headmaster ten years ago，从句的谓语动词为visited ，先行词在从句中作地点状语，故用where或in which。
3
6. This is the school___th_a_t_/w__h_ic_h_/_省__略__ I worked in ten years ago.
【解析】先行词为the school，定语从句为I visited ten years ago，从句的谓语动词为visited，先行词在从句中作visited的宾语，因先行词为物，故引导词用that， which或省略。
3
2. This is the school_W_h_e_r_e_/i_n_w__h_ic_h_ I worked ten years ago.
【答案】 A—b; B—a; C—c。
1
英语中定语从句放修饰词后，作后置定语，以引导词作为标志；汉语中定语从句放修饰词前，以“ 的”为标志。

高考英语专项定语从句语法详解以及练习题

高考英语专项定语从句语法详解以及练习题定语从句确实是由关系代词和关系副词引导的从句，同时作定语修饰主句中某一名词或代词（一）定语从句一样由关系代词和关系副词引导1、关系代词：who, whom, whose, which, that, as2、关系副词：when, where, why关系代词和关系副词必须位于主句先行词之后，定语从句之首，，起着连接先行词和定语从句的作用，同时在从句中又充当句子成分。

先行词：定语从句修饰的词叫先行词。

She is the girl who/that lives next door. 她确实是住在隔壁家的女孩。

关系代词that 人/物主语宾语Which 物主语宾语Whom 人宾语Who 人主语宾语Whose 人/物定语As 人/物主语宾语先行词在定语从句中作的语法成分关系副词when 时刻名词状语Where 地点名词状语Why 缘故reason 状语关系副词when（指时刻，在定语从句中作时刻状语，where（指地点，在定语从句中作地点状语），why（指缘故，在定语从句中作缘故状语）。

who, whom, whose, which, that, as的使用先行词指人，在定语从句中作主语，用who/that,同时不能省略She is the girl who/that lives next door. 她确实是住在隔壁家的女孩。

先行词指人，在定语从句中作宾语，用whom/who/that,能够省略That is the girl whom/who/that I teach. 那个确实是我教的女孩。

先行词指物，在定语从句中作主语，用which/that,同时不能省略The work that/which has just been finished is very important. 刚刚完成的那份工作专门重要。

先行词指物，在定语从句中作宾语，用which/that,能够省略This is the book which/that I want to read. 这确实是我想读的一本书。

高中英语语法专题：定语从句

高中英语语法专题：定语从句一、关系代词引导的定语从句1、that 指人或物在从句中作主语，宾语或表语which 指物在从句中作主语，宾语或表语(作宾语时可以省略) who 指人在从句中作主语，宾语或表语whom 指人在从句中作宾语whose 指人或物在从句中作定语as 指人或物在从句中作主语，宾语或表语but 指人或物在从句中作主语，宾语或表语注意：指物时，whose+名词=the+名词+of which或of which+the+名词2、as 的用法(1)常用于下列结构：such…as; so…as;the same…as; as…as注意：the same…as 表示同一类，不同一个the same…that 表示同一个(2)as与which的区别a、位置不同as可放在主句后，主句前或主句中间;which只能放在主句后。

b、as起连接作用，表达说话人的观点、看法，并指出主句内容的根据或出处，意为“正如，正像”。

Which相当于并列句，可以用and this来代替，意为“这一点，这件事’”。

注意：as常用于下列结构：as we know/ as is known to all, as we all can see, as has been said before/above,as might be excepted, as is often the case, 一般不能用which代替as。

c、在从句中作主语时，which既可作系动词be的主语也可作实义动词的主语，而as只可作系动词be的主语。

3、but用作关系代词，相当于who/that…not例：In China there is no one but knows Lei Feng.二、只用that不用which的情况1、.先行词为all , much, everything, nothing , something ,anything, nothing, none, the one等不定代词时2、先行词被only, any, few, little, no , all, just , very ,right等修饰时.3、当先行词是最高级或被形容词最高级修饰时。

高考英语语法之从句讲义：定语从句精讲

高考英语语法之从句讲义：定语从句精讲充当定语的句子叫定语从句。

定语从句修饰的名词叫先行词(the antecedent).定语从句由关系代词: who, whom, which, 关系形容词whose 和关系副词when, where, why引导，关系词除了起连接从句和名词的作用外，还作从句的句子成分。

1.限制性定语从句Who的先行词是人，作定语从句的主语：This is the man who will give us a talk tomorrow.Whom的先行词是人，作定语从句的宾语：This is the man whom I talked about the other day.Which 的先行词是物，作从句的主语和宾语Here is a book which may be helpful in you English study.This is the book which I like best.上述例句都可改用that.Whose是个关系形容词，在从句中作定语。

A teacher is a person whose duty is to teach.When, where, why 分别作从句的时间状语、地点状语和原因状语。

He will never forget the day when the accident took place.This was the room where we studied.Do you know the reason why he was late?2.非限定性定语从句：非限定性定语从句所修饰的先行词可以是名词（许多是专有名词），也可以是整个主句，它对先行词不加限定，只起附加说明作用，如果没有，也不影响句意和语法结构。

非限定性定语从句和先行词书写时有逗号断开。

Yesterday I happened to see John, who was eager to have a talk with you.She was late again, which was annoying.区分限定性定语从句和非限定性定语从句很重要。

高考英语语法专题- 定语从句

14.（09宁德质检） To the woman teacher’s disappointment, the student___ she thought highly failed the final exam. A. of whom B. of which C. for whom D. for which 答案：A
5.（福建卷）By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma,_____appeared a rare rainbow soon. A. Of which B. on which C. from which D. above which 答案：D 7.(陕西卷）The man pulled out a gold watch,_____ were made of small diamonds. A.the hands of whom B. whom the hands of C. which the hands of D. the hands of which 答案： D 10.(江苏卷）The Science Museum,____ we visited during a recent trip to Britain, is one of London’s tourist attractions. A. Which B. what C. that D. where 答案:A
28.（09岳阳信息） We hope that the measures to control the stock market,_____ are taken by the government, will work. A. that B. where C. which D.what 答案：C

高三英语一轮复习语法专题---定语从句知识点梳理与题库

定语从句知识点梳理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。

3. 先行词：被定语从句修饰的名词、代词称为先行词。

一、关系词的用法(一)关系代词who, whom, whose, that, which（在句中作主语、宾语或定语）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）, 如：They rushed over to help the man whose car had broken down.Please pass me the book whose (of which) cover is green.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.The package (which / that) you are carrying is about to come unwrapped.4) asAs用于先行词前有as, so, such, the same修饰的限制性定语从句.You can take as many books as you need.(二) 关系副词when, where, why（在句中作状语）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 hegrew up.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)(2) This is the watch for which I am looking. (F)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. “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.4. 介词后面的关系词不能省略。

高中英语语法复习——定语从句(共45张ppt)

2、先行词：被定语从句修饰的名词或者代词叫做先行词。定语从句通常置于它所修饰的成分之后。
eg: The boy who is playing basketball is my younger brother.
3、关系词：引导定语从句的关联词就叫关系词。
A. 把从句和主句中被修饰的先行词连接在一起．
2. I think the day will finally come______ air pollution can be put under control. A. that B. which C. when D. as
3. This is the store______ we visited the famous shop assistant. A. where B. there C. that D. which
结构分析：系词所指代的先行词在句中作 know的宾语。
4. I don’t like the way _____ you speak to her. A. / B. that C. in which D. all A, B and C
特别注意!（5）
在实践中会遇到很多形似定语从句的句子，要注意定语从句与其它从句的结构上的细微差别, 能够正确区分使用它们.
couldn’t be found.
A. that
B.where C. in which D. in that
The places couldn’t be found.可知关系词所指代的先行词在句中作主语。
结构分析：
3. This is the reason ______ he has always been eager to know for these years. A. which B. why C. for which D. because He has always been eager to know the reason for these years.可知关

高考英语复习定语从句

语法复习四：定语从句（一）定语从句一般由关系代词和关系副词引导1、关系代词：who, whom, whose, which, that, as2、关系副词：when, where, why关系代词和关系副词必须位于从句之首，主句先行词之后，起着连接先行词和从句的作用，同时在从句中又充当句子成分。

e.g. She is the girl who sings best of all.（关系代词who在从句中作主语）The comrade with whom I came knows French.（whom在从句中作介词with的宾语）3、关系代词和关系副词的用法：1）当先行词为人时用who 作主语，whom作宾语；2）当先行词为物或整个句子时用which ，可作主语或宾语；3）先行词为人、物时用that ，可作主语或宾语；4）whose用作定语，可指人或物；5）关系副词when（指时间，在定语从句中作时间状语，where（指地点，在定语从句中作地点状语），why（指原因，在定语从句中作原因状语）。

（二）限制性定语从句与非限制性定语从句1、限制性定语从句：从句与主句关系密切，去掉从句，主句意义不完整，甚至不合逻辑。

e.g. I was the only person in our office who was invited.（去掉定语从句，意思就不完整）2、非限制性定语从句：从句对先行词关系不密切，去掉定从句，意思仍然完整。

形式上用逗号隔开，不能that用引导。

e.g. Tom’s father, who is over sixty, still works hard day and night.（who引导非限制性定语从句，整个句子可分成两句来翻译）（三）使用定语从句时特别注意的几个问题1、that与which的区别。

1）用that而不用which的情况：①先行词为不定代词all, anything, nothing, …；②先行词有最高级修饰，有序数词修饰；③先行词有only, very, any等词修饰；④先行词既有人又有物时。

高考英语语法知识点专题复习—定语从句

高考英语语法知识点专题复习—定语从句定语从句---基础篇一、定语从句（一）：1. 定语从句的概念：在复合句中，修饰某一名词或代词的从句叫定语从句。

2. 先行词：被定语从句修饰的名词或代词叫先行词。

3. 关系词：引导定语从句的连词叫关系词。

如that、which、who、whom、whose、as、where、when、why等。

4.由that、which、who、whom、whose引导的定语从句。

二、定语从句（二）：1. 先行词是物时，一般情况既可用that也可用which. 但下列情况下，只能用that 不用which。

1). 当先行词为指物的不定代词，如all、everything、something、anything、nothing、none、the one等时，只能用that。

There is nothing ______ I can do for you.2). 当先行词被the only、the very、the last、all、no、little等词修饰时，只能用that。

This is the very book ______ I’m looking for.3). 先行词被序数词修饰时，只能用that。

This is the first textbook ______ I studied in the middle school.4). 先行词为最高级或被最高级修饰时，只能用that。

This is the most beautiful mountain ______ I have ever seen.=I have _____ seen _____ a beautiful mountian.5). 先行词既有人也有物时，只能that。

He told us many interesting things and persons _______ we had.2. 先行词是物时，一般情况既可用that也可用which. 但下列情况下，只能用which不用that。

高中英语2025届高考语法复习定语从句知识讲解练习

高考英语语法复习定语从句知识讲解练习1.定语从句定义定语从句是用来修饰名词或代词的从句。

可分为限定性定语从句和非限定性定语从句。

1.限制性定语从句：对先行词起限定修饰作用He is a man who likes travelling and reading.和主句关系密切，不用逗号隔开，去掉主句,句子不完整。

2. 非限制性定语从句：对先行词起修饰作用(先行词与定语从句之间用逗号隔开)The house, which I bought last year, has a beautiful garden.也可以对主句起修饰作用He was late again, which made his teacher angry.和主句关系不密切，用逗号分开，去掉主句，句子完整。

2.先行词先行词是被定语从句修饰的成分。

先行词可以是名词、代词或整个主句。

先行词是指人时，可用that, who, whom, whoseThis is the person ( who/whom/that ) you want to see.先行词是指物时，可用which, that, whoseI like to live in a room that / which has a window facing south.3.关系词关系词：关系代词和关系副词两种关系代词：that, which, who, whom, whose, as在从句中作主语，宾语，表语，定语先行词是指人时，可用关系代词：that, who, whom, whoseThis is the person ( who/whom/that ) you want to see.先行词是指物时，可用关系代词：which, that, whoseI like to live in a room that / which has a window facing south.I like to live in a room whose window faces south.=I like to live in a room of which the window faces south.=I like to live in a room the window of which faces south.关系副词：when, where, why 在从句中作状语先行词是表示时间的名词时，可用when, in which, on which等；I never forget the day when / on which I came to this school.先行词是表示地点的名词时，可用where, in which, at which等；The factory where / in which his father works is far from here.This is the factory where /in which he works.如果定语从句修饰point，situation，part，condition和case等表示抽象意义的词，常用where 引导We have reached a point where a change is needed.区分：there’s one point that we must insist on.先行词是表示原因的名词时，可用why, for which等。

高考英语语法—定语从句(共23张PPT)

As is said above, as is mentioned above, as is often the case (with…), (对…)这是常有的事 as is reported, As everybody knows,
When: 指“时间”，在定语从句中作时间状语，用
在表示时间的词后面。
Which: 指“物”，在定语从句中作主语或宾语 Eg: The book which is on the table is mine.
The book about which you talked is cheap. He failed again, which made me unhappy. That: 指人或物，在定语从句中作主语、宾语或表语 Eg: All that glitters is not gold. I am no longer the person that I used to be.
I will never forget the day when I joined the army. I visited the factory where my mother worked. I will tell you the reason why I was late.
特殊情况： We stood on the top of the hill, from ____ we could see the whole town. He left in 1989, since ____ he has been working in a bank.
1.定义：在主从复合句中作定语的从句称之为定语从句。定语从句常常放在所修饰的名词或代词后面。被修饰的名词或代词叫做先行词。
2.关系词： 2.1 作用

高考英语复习语法专题精讲精练定语从句

高考英语复习语法专题精讲精练定语从句（含练习习题及解析）一、that与which,who, whom的用法区别情况用法说明例句①先行词为all,everything,anything,nothing,little,much等不定代词时②先行词被all,any,every,each,much,little,no,some,few等修饰时只用that的情况③先行词有形容词最高级和序数词修饰时④先行词既指人又指物时⑤先行词被the only,the very修饰时①He told me everything that he knows.②All the books that you offered has been given out.③This is the best film that I have ever read.④We talked about the persons and things that we remembered.⑤He is the only man that I want to see.⑥句中已经有who或which时，为了避免重⑥Who is the man that is making a speech?复时①在非限制性定语从句中，只能用which指代①He has a son,who has gone abroad for只用which, who,whom的情况只用that，in which或不用关系词的情况物，用who/whom指人②在由“介词+关系代词”引导的定语从句中，只能用which指物，whom指人。

③先行词本身是that时，关系词用which,先行词为those, one,he时多用who。

the way做先行词时further study.②I like the person to whom the teacher istalking.③Those who respect others are usuallyrespected by others.①Mary,there is one way that you couldstop others talking about you andcriticizing you.②I was struck by the beauty of the way inwhich she stood.③What surprised me was not what he saidbut_______he said it.A. the wayB.in the way thatC.in the wayD.the way which二、as与which,that的用法区别从句区别例句限制性定语从句中非限制性He is not such a fool as he looks.名词前有such和the same修饰时，关系代Don’t read such books as you can’t 词用as,不能用whichunderstand.as和which都可以指代前面整个主句。

高考英语 14种从句用法总复习之定语从句用法

高考英语 14种从句用法总复习之定语从句用法高考14种从句用法总复习之定语从句用法定语从句一、定语从句用法讲解用来修饰名词或代词的从句叫定语从句。

被定语从句所修饰的名词或代词叫先行词。

定语从句一般跟在先行之后。

用来引导定语从句的代词叫关系代词。

关系代词有who, whom, whose(指人)；that, which(指物),用来代替先行词。

that也可以指人,which 不能指人。

who, whom, which, that 在定语从句中作主语或者宾语；whose在定语从句中作定语。

例如：This is the boy who is good at English.This the boy (whom) Mr. Cheng teaches every day. This is the boy whose father is an English teacher. This is the desk whose leg is broken.= This is the desk the leg of which is broken. = This is the desk of which the leg is broken.This is the book that/which was bought by Tom yesterday. This is the book (that /which) he bought yesterday. This is the book whose cover is gone.注意：关系代词在定语从句中作宾语可以省略。

用来引导定语从句的副词（when, where, why）叫关系副词。

when, where, why代替前面的表示时间、地点、原因的先行词。

关系副词在定语从句中作状语。

例如：I will never forget the day when I joined the Party. This is the school where Mr. Cheng works.This is the reason why Li Ping is often late for class. 二、定语从句用法定语从句是中学阶段的语法重点，也是历年高考的热点。

2025高考英语一轮复习语法专题：专题四第1讲定语从句

4.引导非限制性定语从句时as与which的区别
关系词
位置不同
表意不同
既可以放在主句前，也意为“正如……”，后面的谓语动
as 可以放在主句后，有时词多用see，know，expect，say，
还可插入主句中
mention，report等
which 通常放在主句之后
意为“这一点”或“这件事”等
As anybody can see，the elephant is like a snake. 正如每个人所看到的一样，这头大象像一条蛇。 The number of smokers，as is reported，has dropped by 17 percent in just one year. 正如报道的那样，吸烟者的数量仅在一年内就已经减少了百分之十七。 She married again，which was unexpected. 她再婚了，这是始料未及的。
2.that和which引导的定语从句 that代替的先行词可以是人也可以是物，但是which代替的先行词只能是物。使用这两个关系词要注意以下两点： (1)6种只用that引导定语从句的情况。 ①先行词是 all ，everything ，anything ，nothing ，something ，little ， much，none，few，the one等不定代词时。 ②先行词被all，any，few，every，no，little，much，some等修饰时。 ③先行词被序数词、形容词最高级修饰或先行词本身是序数词或形容词最高级时。 ④先行词被the only，the very (正是，恰是), the last修饰时。
5.定语从句中的主谓一致 (1)关系代词作从句的主语时，从句中谓语动词的人称和数要与先行词保持一致；先行词是句子时，从句的谓语动词用单数。 The recorder that has been given to me is homemade.给我的那台录音机是国产的。