1.People spoke highly of the driver_____,in spite of the terrible weather, had saved his passengers from danger.
A.which
B.who
C.whom
D.as
2.The island_____he lived in his childhood is far from the town.
A.which
B.in which
C.on which
D.that
3.I hope to get_____a tool______he repaired this machine with.
A.such;that
B.so;that
C.such;as
D.as;as
4.The soldiers stopped at the edge of a wood,______was the right place for an ambush(埋伏).
A.they thought where
B.they thought which
C.where they thought
D.which they thought
5.Nathan Hale,_____the British guard had found the maps of the British army's defence works,faced his enemy bravely.
A.in whose boot
B.in which boot
C.whose boot
D.which boot
6.The factory has 500 workers,40 percent_____are women.
A.of which
B.of whom
C.of them
D.of that
7.He often talked about the artists and paintings_______impressed him greatly.
A.which
B.who
C.that
D.不填
8.Students are sure to benefit from every minute_______the best(use) of to study their lessons.
A.which makes
B.what they make
C.that is made
D.when is made
9.This cook is_______we dropped in the other day.
A.whom
B.on whom
C.the one
D.the one on whom
10.I will never forget the days_______we spent together and_____we made friends with some farmers.
A.when;that
B.that;when
C.when;when
D.which;which
11._______is known to all,the Xisha Islands are the territories(领土)of China.
A.As
B.It
C.Which
D.That
12.His family,_______all music lovers,don't want to miss MTV programs.
A.who is
B.which is
C.who are
D.which are
13.Who is the person_______asked for me just now?
A.who
B.that
C.whose
D.whom
14.He asked more than one elder for advice,_______he hoped to make a wiser decision.
A.which
B.by which
C.by which means
D.by that means
15.His technique has developed to the point_______he can repair many of the electrically powered farm machines.
A.when
B.that
C.where
D.which
16.Those______have not got bikes may go by bus.
A.that
B.who
C.不填
D.which
17.This is the first time I______here.
A.have been
B.have gone
C.am
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18.I,_______,will try my best to help you out of the difficulty.
A.who is
B.that is
C.who are
D.who am
19.The comrade I share the room________is a young teacher fresh from college.
A.with him
B.with whom
C.with
D.in
20.What do you think of the material_______the coat is made?
A.which
B.of which
C.from which
D.in which
21.The fire started on the first floor of the hospital,______patients were elderly people.
A.many of whose
B.whose many
C.many whose
D.many of whom
22.The______why Alice didn't turn up was not made clear.
A.cause
B.matter
C.reason
D.truth
23.He was the only one of the boys who______willing to do the work.
A.is
B.was
C.are
D.were
24.He is not the man_______he used to be.
A.who
B.whom
C.which
D.that
25.What does she do______so different?
A.that is
B.that are
C.which is
D.which are
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】
初中英语分类练习 ——定语从句 【复习目标】 ▲掌握定语从句的意义及作用。 ▲区别各类引导词。 【课前准备】 ●要求学生用定语从句造五个句子。 【知识要点】 在复合句中，修饰名词或代词的从句叫定语从句，被修饰的名词或代词叫先行词，引导定语从句的有关系代词who, whom, whose, which, that等和关系副词where, when, why等，关系代词和关系副词在定语从句中担任句子成份。 1.由who引导的定语从句中，who用作主语，如：This is the boy who often helps me. 2.由whom引导的定语从句中，whom用作宾语，如：The man whom you are waiting for has gone home. 3.由whose引导的定语从句中，whose用作定语，如：Do you know the girl whose skirt is white? 4.由which引导的定语从句中，which用作主语或谓语动词的宾语或介词的宾语，如： The room in which there is a machine is a work shop. The river which is in front of my house is very clean. 实用文档
This is the pen which you want. 注意： (1)whom, which用作介词宾语时，介词可放在whom、which之前，也可放在从句原来的位置上；但在含有介词的动词固定词组中，介词只能放在原来的位置上。如：He is the very person whom we must take good care of. (2)引导非限制性定语从句时，必须用关系代词which，不用that,如：I have lost my bag, which I like very much. (3)关系代词在句中作主语时，从句的谓语动词的人称和数必须和先行词保持一致。 5.由that引导的定语从句中，that可以指人或物，在从句中作主语或谓语动词的宾语，但不能放在介词后面作介词宾语，如： The book that I bought yesterday was written by Lu Xun. 注意在下面几种情况下必须用that引导定语从句。 (1)先行词是不定代词all, few, little, much, something, nothing, anything等，如： All that we have to do is to practise English. (2)先行词被序数词或形容词最高级所修饰，如 The first letter that I got from him will be kept. (3)先行词被all, any, every, each, few, little, no, some等修饰，如 I've eaten up all the food that you gave me. 实用文档
一、什么是定语 定语是对名词或者代词进行修饰或者限定的成分,定语一般可以翻译成“….的” 二、定语可以由什么充当。 the green team ______________ a girl in red _______________ a book written by Luxun _____________ the girl sitting next to me ______________ the work to be done __________________ a lady who sat next to a black man ______________________ 三、定语从句的三大要素 1. 定语从句______________________________________________ 2. 先行词__________________________________________________ 3. 关系词（关系代词、关系副词）_________________________________ 关系代词有that, which, who, whom, whose, as 关系副词有when, where, why 四、判断下列复合句中的从句是否为定语从句。 1. The man that helped you is Mr. White. 2. Our teachers and parents hoped that we can enter a good university after graduating from Huairen high school three years later. 3. This is the school bag which my mother bought me yesterday. 4. The one who cleans the blackboard should be praised. 5. China is no longer what it used to be. 6. I don’t know the boy whom you gave the book to just now 五、关系词的三大功能 1. 引导定语从句 2. 在从句中替代先行词（从句中不能再出现先行词或代替先行词的代词） 3. 在定语从句中充当一定的成分 功能2讲解： 判断下列两组定语从句的正误 ①The student whom we saw just now is the best runner in our school. ②The student whom we saw him just now is the best runner in our school. ③The trees which are behind the office building have lost their leaves. ④The trees which they are behind the office building have lost their leaves. 功能3讲解见课本P8 六、关系代词的用法 1. 在定语从句中，当先行词为物时，关系代词可以用that 或which, 在从句中可以做主语或宾语，其中做宾语时可以被省略。 ?The earthquake which/that happened in 1906 was the biggest in American history. ?The train which/that h as just left is for Shanghai. ?He likes the birthday presents that/which/ his friends gave him.
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 ,但就是case, situation都不就是地点,如何理解？ 在“先行词不就是表示地点的名词”的前提下,如何判断就是否使用关系副词where来引导定语从句的问题就是一个高频考点。就就是说,关系副词where 所指代的先行词不只就是表示地点的名词。
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,它的先行词就就是表示地点的名词,但事实并不就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。请瞧以下几个例句: Other research, where siblings have been asked to say who their mother and father favor, suggests that mothers do tend to show a preference for their first-born son, but fathers often show great affection for their youngest daughters、 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。
英语定语从句用法总结 定语从句，一个简单句跟在一名词或代词后关系代词的用法：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 we have just seen is a famous writer. Where is the book 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： 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 He’s written a book the name of which I’ve completely forgotten. 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 we met yesterday. 3. why指原因或理由，它的先行词只有reason。如： That is the reason why he is leaving so soon. 注：why时常也可以省略。如： That is the real reason he did it. + which; where = in he arrived. The office where he works is on the third floor. This is the chief reason why we did it. 2. 当先行词是表时间的time, day等和表地点的place, house等时，一定要注意分析从句的结构，如果缺少主语或 宾语时，关系词应该用which或that, 缺少时间状语或地点 状语时，才能用when或where，试比较： I’ll never forget the day when my hometown was liberated. I’ll never forget the days which/that we spent together last summer. His father works in a factory where radio parts are made. His father works in a factory which/that makes radio parts. 3. when和where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。而why 只
M1 Unit 1School life I.短语总结 1.be happy/satisfied with 对…满意；因为…开心 2.attend (an) assembly 参加集会 3.earn respect from sb. 赢得某人的尊重 earn a living by 靠...生活 4. have/ show respect for 对...尊敬的 5. devote oneself to doing sth投入于做某事 6. get /be interested in 对…产生兴趣 7. make a speech about 做关于…的演讲 8. miss a chance to do sth. 失去做某事的机会 9. leave out 省略，遗漏 10. regret to do sth. 遗憾要做某事 regret doing/having done sth. 后悔做过某事 11. inform sb.of/about sth./inform sb.that… 通知某人某事 12. run a company/a school 管理公司/ 学校 13. require sb.to do sth. 要求某人做某事 14. On/upon finishing his studies 学习一结束 15. for free/for nothing/free of charge 免费 16. all year round 一年到头 17. show respect for sb. 尊敬某人 18. prepare for 为…做准备 19. achieve high grades 获得高分 20. be used to doing sth. 习惯做某事 21. come up with 提出 22. on display 在展览中 23. be independent of 从...独立 24.the + 比较级..; the +比较级越...越... 25. spend 时间/ 钱（in）doing sth/ on sth 26.be available for 可被使用的/得到的 27.have much experience in 在某方面有经验的 28.select....from 从...中选择 29.be fluent in 在某方面流利的 30.be broadcast live 现场直播 31.It’s useless doing sth 做某事没有用
Attributive Clause 课型：语法课课时：第一课时 【Curriculum demands】 1．Learn basic information about attributive clause 2．Master the usage of relative pronouns and relative adverbs 【Demands in the exam】 1．Study the differences between relative pronouns and relative adverbs 2．Try to analyze sentences and choose correct relative words 【Learning aims】 1．Foster the ability to analyze long sentences 2．Try to write sentences with attributive clauses 自学 内容 Review the basic information about attributive clause 要求 1．Refer to the notes or grammar books to find the basic concepts 2．Master the attributive clauses introduced by that/which/whom/who/whose 相关概念 主句、从句、关系词 例句：This is the boy who won the first prize in the English Speech Competition. 主句：在含有定语从句的复合句中，除去定语从句后的部分，是句子的主句。(This is the boy.是主句。) 定语从句：相当于形容词，修饰主句中的一个名词或代词（有时修饰整个主句，相当于主句的一个定语。）(例句中，who won the first prize in the English Speech Competition是定语从句，修饰the boy。) 先行词：先行词就是被定语从句修饰的名词等，它总是出现在定语从句的前面。(the boy是先行词。) 关系词：关系词指用来引导定语从句的词，分为关系代词和关系副词。(who是关系代词。) 关系词的三个作用 作定语从句的一个句子成分。起着连接主句和从句的作用。代指被修饰的先行词。（例句中who作定语从句的主语，同时起着连接作用，在意思上，指代的是前面的先行词the boy。） 关系代词 指人时可以用who, 也可用that。 Do you know the boy who/that is my desk mate? 指物时可以用which, 也可用that。 I like visiting places which/that are not far away. whose可以指人也可以指物。 He was a painter whose pictures were not well- known in his life time. 关系代词作宾语时可以省略。 I like the meal that/which / ( ) we had last night. 注：（）表示关系代词省略 关系副词 关系副词在从句中只能作状语。when 指时间，where指地点，why指原因，how不能作关系词。如： We will put off the picnic until next week when the weather may be better. He has reached the point where a change is needed. That is no reason why you should leave. 基础过关 1. 用合适的关系词完成句子。 The man ______ /______ was here yesterday is a painter. The man ______ /______ /______ /______ I saw is called Smith. A child ______ parents are dead is called an orphan. I’d like a room ______ window looks out over the sea. 问题中心以学为本先学后教合作展评
定语从句 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, whi ch, 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。 先行词：被定语从句修饰的名词、代词称为先行词。 （一）限定性定语从句 一、关系代词（在句中作主语、宾语或定语） 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anyt hing, everything, nothing , none等不定代词时，或者是由every, any, all, some, no, little, few, muc h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 5. 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。 二、关系副词（在句中作状语） 关系副词=介词+关系代词 why=for which where=in/ at/ on/ ... which (介词同先行词搭配) when=during/ on/ in/ ... which (介词同先行词搭配) 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 remembe r the first time I met her. Each time he goes to business trip, he brings a lot of living necessiti es, such as towels, soap, toothbrush etc。
高中定语从句详解与练习 （一）定义及相关术语 1．定语从句：修饰某一名词或代词的从句叫定语从句。定语从句一般紧跟在它所修饰的先行词之后。 2．先行词：被定语从句修饰的词叫先行词。 3．关系词：引导定语从句的词叫关系词。 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when, where, why等。 关系词通常有下列三个作用：A、引导定语从句；B、代替先行词；C、在定语从句中担当一个成分。例如： The man who is shaking hands with my father is a policeman. 该句中， who is shaking hands with my father 是定语从句，修饰先行词the man，“who”是引导定语从句的关系词，代替先行词the man，在定语从句中作主语。 （二）关系代词引导的定语从句 1．who 指人，在定语从句中作主语。 The boys who are playing football are from Class One. 正在踢足球的男孩是一班的。Those who want to go to the museum must be at the school gate at 7 tomorrow morning. 想 去博物馆的人必须在明晨7点到大门口集合。 Yesterday I helped an old man who had lost his way. 昨天我帮助了一位迷路的老人。That is the teacher who teaches us physics. 那就是教我们物理的老师。2．whom 指人，在定语从句中做宾语，常可省略。 Mr Liu is the person ( whom ) you talked about on the bus. 刘先生就是你们在公共汽车 上谈论的那个人。 Li Ming is just the boy ( whom ) I want to see. 李明正是我想要见的男孩。 The professor ( whom ) you are waiting for has come. 你正在等的教授已经来了。 The girl ( whom ) the teacher often praises is our monitor. 老师经常表扬的那个女孩是我 们的班长。 注意：关系代词whom 在口语或非正式文体中常可用who 来代替，也可省略。 The man ( whom / who )you met just now is my old friend. 3．Which 指物，在定语从句中做主语或宾语，做宾语时常可省略。 Football is a game which is liked by most boys. 足球是大多数男孩所喜欢的运动。 The factory which makes computers is far away from here. 制造计算机的那家公司离这儿很远。 He likes to read books which are written by foreign writers. 他喜欢外国作家写的书。 The house which is by the lake looks nice. 湖边的那幢房子看上去很漂亮。 This is the pen ( which ) he bought yesterday. 这是他昨天买的钢笔。 The film ( which ) they went to see last night was not interesting at all. 他们昨晚看的电影一点意思也没有。 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。
when 和 where 引导定语从句的用法 定语从句既是英语语法的一个重点，同时又是一个难点。说它是难点，主要难在两点上：一点是如何正确判断什么样的汉语句子要译为英语的带定语从句的复合句；另一点是定语从句的引导词较多(包括关系代词who, that, which, as 和关系副词when, where, why)，而且其用法也较复杂。那么到底什么情况下用when和where来引导定语从句呢？它们又该怎么用呢？下面就举例说明： 一、when：当主句中的先行词(即主句中被后面定语从句修饰的词)是表示时间意义的名词时，它只能作定语从句的时间状语，放在定语从句句首。如果定语从句的引导词是作该定语从句的主语或宾语，则要改用关系代词that或which来引导。例如： The days when we used foreign oil are gone. 我们用洋油的日子一去不复返了。 I'll never forget the day when I was born. (=I'll never forget my birthday.) 我永远不会忘记我出生的日子。 It happened in November when the weather was wet and cold. 这事发生在天气又湿又冷的十一月。 In the years that (which) followed, Marx kept on studying English and using it. 在这之后的几年中，马克思继续学习和使用英语。(that作定语从句"that followed"的主语) The day (that) I always remember in all my life is my birthday. 我一生中最难忘的日子是我的生日。(that作定语从句"that I always remember in all my life"的宾语，that可以省略)
定语从句用法总结 一.定义：定语由一个句子来充当，那么这个句子就叫做定语从句。 eg: The old town has narrow streets and small houses that are built close to each other.其中划线部分为定语从句。 二.分类：分为限制性定语从句和非限制性定语从句，还有间隔性定语从句。 eg: is the school (that/which)we visited last year. （限制性定语从句） weather turned out to be very good,which was more than we could expect. （非限制性定语从句） days are gone when physical strength was all you needed to make a living.（间隔性定语从句） ] 注：定语从句和非限制性定语从句的区别 限制性定语从句无逗号隔开、不可缺少、起修饰限制作用；而非限制性定语从句有逗号隔开、可有可无、起补充说明作用。 三.构成：定语从句有先行词、引导词和从句构成。 先行词是定语从句所修饰限制的名词或代词。 引导词是用来引导定语从句的关系代词或关系副词。 eg: The old town has narrow streets and small houses that are built close to each other. 此句中先行词为：narrow streets and small houses, ( 引导词为：that，定语从句为：that are built close to each other 四．基本原则 定语从句中不能出现与先行词在意义上相一致的词 is the book that I like it best .(it 与book指同一物，所以要去掉。) 五．定语从句中常见考点：
M1U1 Grammar and usages Attributive Clauses导学案 课时目标：回顾句子成分中的定语，及定语从句； 五个关系代词的用法 课时重难点：关系代词的指代及所做成分 一、回顾已知，引入课题。 观察下列短句，划出其中的名词、形容词、介词短语。并将它们译成中文。 1.an enjoyable experience 2.best friends 3.the rules of the school 阅读Point 1 on P8 模仿翻译：穿红衣服的女孩子们 二、自主学习，边学边导。 (一)定义、概念 1、定义：在复合句中，修饰或限定主句中某一个________或________,并充当定语的从句是定语从句 2、相关概念： ●被定语从句所修饰或限定的名词或代词称为__________ ●引导定语从句的词称为________, 可在句中作主语、宾语、定语、状语等Ex1 读下列小短文，并找出3个定语从句，完成下列表格。 Little Tom asked his mother for two dollars. "What did you do with the money that I gave you yesterday?" "I gave it to a woman who is poor and old" he answered. "You're a good boy," said the mother happily. "Here are two dollars more. But why are you so interested in the old woman?" Ex.2将下列定语从句拆分成两个简单句 1、Do you know the man who is talking with your mother? _____________________________________________________________________ 2、I like those books whose topics are about history. _____________________________________________________________________ 3、A plane is a machine that can fly. _____________________________________________________________________
as引导定语从句的用法 as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which 引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思 (1) As is known to all, China is a developing country. (2) He is from the south, as we can see from his accent. (3) John, as you know, is a famous writer. (4) He has been to Paris more than several times, which I don’t believe. ================================ 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 a lways 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。
英语定语从句用法详解 在复合句中，修饰名词或代词的从句叫定语从句，被修饰的名词或代词叫先行词，引导定语从句的有关系代词who, whom, whose, which, that等和关系副词where, when, why等，关系代词和关系副词在定语从句中担任句子成份。 1.由who引导的定语从句中，who用作主语，如：This is the boy who often helps me. 2.由whom引导的定语从句中，whom用作宾语，如：The man whom you are waiting for has gone home. 3.由whose引导的定语从句中，whose用作定语，如：Do you know the girl whose skirt is white? 4.由which引导的定语从句中，which用作主语或谓语动词的宾语或介词的宾语，如： The room in which there is a machine is a work shop. The river which is in front of my house is very clean. This is the pen which you want. 注意： (1)whom, which用作介词宾语时，介词可放在whom、which之前，也可放在从句原来的位置上；但在含有介词的动词固定词组中，介词只能放在原来的位置上。如：He is the very person whom we must take good care of. (2)引导非限制性定语从句时，必须用关系代词which，不用that,如：I have lost my bag, which I like very much. (3)关系代词在句中作主语时，从句的谓语动词的人称和数必须和先行词保持一致。 5.由that引导的定语从句中，that可以指人或物，在从句中作主语或谓语动词的宾语，但不能放在介词后面作介词宾语，如： The book that I bought yesterday was written by Lu Xun. 注意在下面几种情况下必须用that引导定语从句。 (1)先行词是不定代词all, few, little, much, something, nothing, anything等，如： All that we have to do is to practise English. (2)先行词被序数词或形容词最高级所修饰，如 The first letter that I got from him will be kept. (3)先行词被all, any, every, each, few, little, no, some等修饰，如 I've eaten up all the food that you gave me. (4)先行词被the only, the very, the same, the last修饰时如 He is the only person that I want to talk with. (5)先行词既有人又有物时，如: They talked about persons and things that they met. (6)当句中已有who时，为避免重复，如：Who is the man that is giving us the class? 6.由when, where, why引导的定语从句，如: I don't know the reason why he was late. This is the place where we have lived for 5 years. I'll never forget the day when I met Mr Li for the first time. 注意：先行词是表示地点时，如果从句的谓语动词是及物的，就用that(which)，如果从句的谓语动词是不及物的，就用where引导。This is the house Which /that he has lived in for 15 years.(Where he has lived for 15 year.)