定语从句讲解及练习(2007-07-19

定语从句1. 定语从句的结构及理解2. 定语从句的关系词的使用3. 定语从句的简化表达知识总结归纳（一）定语从句的结构：在复合句中，修饰某个名词或代词的句子（做这个名词或代词的定语）叫定语从句，定语从句一般放在被修饰的名词或代词后面，被修饰的名词或代词叫做定语从句的先行词，它与定语从句之间要有一个词连接，这个词指代先行词的内容叫做关系词（关系代词或关系副词：that, which, who, whose, when, where, why）。

先行词在定语从句中充当主语，宾语，时间，地点，原因状语。

结构：先行词+关系词+定语从句。

1. There she saw a wall of water that was quickly advancing towards her.2. In Japan, someone who sees another person making the gesture will think it means money.3. A theme park is a collection of rides, exhibitions or other attractions that are based on a common theme.4. The park has a conservation center that helps protect marine animals and their habitats in the rivers and coastal waters of Asia.5. Visitors can go on exciting rides where they can feel what it is like to do the things they have seen their heroes do in the movie.6. Oprah Winfrey is a black woman whose rise to fame is an inspiring story.（二）定语从句分为限定性定语从句和非限定性定语从句：限定性定语从句：从句对先行词进行必要的描述或说明，缺少它，则句义显得不完整，从句与先行词紧密相连。

高中英语定语从句讲解及练习定语从句是高中重点知识，也是高考常考点，大家也不容易掌握，这篇文章主要教你关系代词引导的定语从句关系副词引导的定语从句判断关系代词与关系副词限制性和非限制性定语从句等内容，有例题讲解定语从句在句中做定语，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，在从句中作主语和宾语。

例如：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。

初中定语从句讲解及练习第一部分:基础知识（一）．定语从句概述定语可以由形容词，代词，数词，名词，不定式，介词短语来充当。

如果是一个句子担任定语，那么这个句子就叫做定语从句，又可称为形容词性从句。

定语从句通常修饰某一名词或代词，被定语从句修饰的这一名词或代词叫先行词，它位于定语从句之前，定语从句在先行词后面，应尽量紧跟先行词。

定语从句的作用即在于对先行词进行限定说明或补充说明。

（二）．定语从句的引导词。

定语从句的引导词分为两类，关系代词（that, which, who, whom, whose ）和关系副词（when, where, why ），引导词在先行词和定语从句之间，既起连接作用，即连接先行词和定语从句，更重要的是，它又在定语从句中作一个成分。

（三）．关系代词1. that 指人，物，在从句中作主语，宾语，表语。

This is the photo that I took in the country.He is the singer that I met yesterday.2. which 指物，在从句中作主语，宾语，在非限定定语从句中充当定语，或者代替前句The film which we saw last night was moving.3. who 指人，在从句中作主语，宾语。

The person who visited our classroom yesterday was our new headmaster.The man who you just talked to is Tom.4. whom 指人，在从句中作宾语。

That is the professor whom you want to know.5. whose 指人，物，在从句中作定语，相当于先行词+ ’s, 后接一名词。

I know the boy whose parents are dead.I don’t like those cities whose roads are dirty.注：关系代词在从句中作宾语时可以省略。

定语从句讲解及练习只能用that引导定语从句.This is the first book that I read in English.2.先行词被all。

everything。

nothing。

something。

anything 等不定代词修饰时，只能用that引导定语从句.I need something that can help me relax.3.先行词被the only。

the very。

the same等修饰时，只能用that引导定语从句.This is the only book that I have read.4.先行词是不定式时，只能用that引导定语从句.I have nothing to say that can change his mind.小幅度改写：定语从句是在复合句中修饰名词或代词的句子，被修饰的名词或代词叫先行词。

例如，Mary is a beautiful girl。

如果要用定语从句修饰girl，可以写成Mary is a girl who has long hair。

这里，句子who has long hair作为定语从句，修饰girl。

如果要合并为一个句子，可以写成Mary is a girl (who has long hair)。

关系代词有which。

who。

whom。

whose。

that和关系副词有where。

when。

why。

当先行词是物时，用which或that引导定语从句。

当先行词是人时，用who。

whom。

whose。

that引导定语从句。

其中，who作定语从句的主语或宾语，whom作定语从句的宾语，whose作定语从句的定语，而that可以作定语从句的主语和宾语。

但是，关系代词作动词宾语时可以省略。

下列情况只能用that：1.序数词或最高级adj修饰先行词时，2.先行词被all。

everything。

nothing。

something。

定语从句1、功能： =形容词，修饰名词或代词，在句中作定语一：先行词：被定语从句所修饰的词二：关系词：用来连接定语从句，并在从句中代表先行词。

在从句中充当的成分：主语、宾语学会找关系词，看先行词指的是什么-----先行词，看关系词在从句中所充当的成分。

2、一般用法先行词是物：which that先行词是人：who whom that关系代词在从句中作宾语时可以省略。

e.g. The young man ( whom ) you saw was our manager.There is something ( that ) we must keep in mind.限制性定语从句与非限制性定语从句（逗号隔开非限制）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.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。

2）用 which 而不用that 的情况：①引导非限制性定语从句；② 指代前面整个主句的意思；③ 介词+ 关系代词。

3、 whose 的用法关系代词与其后的名词构成所有格，即“的”时，它既可以修饰指人的先行词，也可以修饰指物的先行词。

e.g. 1. The girl is my daughter. Her work got the first prize.The girl whose work got the first prize is my daughter.4、介宾结构关系代词在从句中作介词的宾语时，介词可以提前，但关系代词只能用which （物）或whom （人）。

定语从句（Attributive Clause）：用作定语的从句叫定语从句。

定语从句一般皆放在被它所修饰的名（代）词之后，这种名（代）词就叫作先行词（Antecedent）。

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用作主语、宾语、定语等；关系副词在定语从句中用作状语。

①引导定语从句的关联词有who, whom, whose, that, when, where, why 和which. 在非限制定语从句中, 只可用which, who, whose, where , when., 如果指代前面整个句子, 多用which.例句：The dog that/which was lost has been found.（失踪的狗已经找到了。

）Those who are in favor of the proposal are expected to discuss it in detail after the meeting.（有人认为那些对这个提案有兴趣的人最好是在会后再具体讨论它。

）There are many organizations whose purpose is to help the homeless.（存在着许多旨在帮助无家可归者的组织。

）②当引导定语从句的先行词前有all, any, no, little, much, very first 等词, 或先行词前为形容词最高级所修饰时,或先行词为all, anything, nothing, something, everything 时,从句的引导词只能用that.The only thing that matters to the children is how soon they can have their holiday.（孩子们唯一关心的是他们什么时候放假。

）These are the very points that puzzle me.（真正困扰我的是这些观点。

(完整)初中英语定语从句讲解及练习初中英语定语从句讲解及练一.定语从句及相关术语1.定语从句：修饰一个名词或代词的从句称为定语从句，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成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。

二.关系代词引导的定语从句1.who指人，在从句中做主语(1) XXX 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。

(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.留意：干系代词whom在白话和非正式语体中经常利用who替代，可省略。

(3) 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者宾语，做宾语时可省略(1) XXX is a game which is XXX.(2) this is the pen (which) XXX.4. that指人时，相当于who或者whom；指物时，相当于which。

在宾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平日指人，也可指物，在定语从句中做定语(1) XXX.(2) i once XXX.whose指物时，经常利用以下布局来替代(3) the classroom XXX.(4) the classroom the door of which is broken will soon be repaired.(5) do you like the book whose cover is yellow?(6) do you like the book the color of which is yellow?三.介词+干系代词指导的定语从句干系代词在定语从句中做介词宾语时，从句常由介词+干系代词指导(1) the school (that/which) he once XXX.(2) the school in which he once XXX.(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 XXX) we have often talked about.(6) we'll go to hear the XXX.留意：1.含有介词的动词短语普通不拆开利用，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 who/that you talked with is my friend. (f)(3) the plane in which we XXX)(4) the XXX)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 ofwhich have gone bad.(3) there are forty students in our class in all, most of whom are from big cities.in the dark street, there wasn't a single person ________ she could turn for help.a. thatb. whoc. from whomd. to whom简析:本题定语从句中的turn与介词to构成固定短语"turn to sb. for help (向某人求助）"。

定语从句讲解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。

（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that4. 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。

英语定语从句讲解及练习一、什么是定语从句定语从句是英语中一种常见的复合句结构，用来修饰名词或代词。

它通常由一个关系词引导，用来限定或描述先行词的属性、特征或状态。

定语从句的引导词有：who, whom, whose, which, that等。

二、定语从句的结构定语从句一般由三部分组成：1. 关系词：引导定语从句的词，如who, which等。

2. 先行词：定语从句所修饰的名词或代词。

3. 从句：包含主语和谓语，并与先行词之间存在关系的句子。

定语从句的位置可以是先行词之前或之后，具体位置取决于引导词的属性。

下面是一些定语从句的例子：- The man who is wearing a blue hat is my brother.who is wearing a blue hat is my brother.- The book which I bought yesterday is very interesting.which I bought yesterday is very interesting.- This is the house that Jack built.that Jack built.三、练请根据所给情景，完整地填入合适的定语从句。

1. The girl whose father is a doctor studies medicine at university.whose father is a doctor studies medicine at university.2. I have a friend who lives in London.who lives in London.3. This is the house that was built in the 18th century.that was built in the 18th century.4. The car which was stolen has been found by the police.which was stolen has been found by the police.5. The student whom I met yesterday is very friendly.whom I met yesterday is very friendly.四、小结英语定语从句是一种常见的句子结构，用于修饰名词或代词。

定语从句讲解，详解及习题（答案解说）定语从句一、概述在复合句中，修饰某一名词或代词，用作定语的从句叫做定语从句(attributive clause)。

被定语从句所修饰的词叫做先行词(antecedent)。

定语从句必须放在先行词之后。

引导定语从句的关联词有关系代词who、whom、whose、which、that和关系副词when、where、why等。

Finally, the thief handed everything that he had stolen to the police.最后，那个小偷向警察交出他偷的所有的东西。

（引导词是关系代词that）His parents wouldn't let him marry anyone whose family was poor.他父母不让他和家庭困难的人结婚。

（引导词是关系代词whose）In the dark street, there wasn't a single person to whom she could turnfor help.在那个黑暗的街道上，没有她可以求助的人。

（引导词是关系代词whom）In 1519 another traveller who went to America from Europe discovered the tomato. 1519年另一位从欧洲去美洲的旅行家发现了西红柿。

（引导词是关系代词who）I still remember the day when I first came to Beijing. 我仍然记得第一次去北京的那一天。

（引导词是关系副词when）This is the house where we lived last year. 这就是我们去年住的房子。

（引导词是关系副词where）二、关系代词和关系副词的功用能关系代词和关系副词用来引导定语从句，在先行词和定语从句之间起纽带作用，使二者联系起来。

（完整版）定语从句全面详细讲解附练习题加答案定语从句详细讲解（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。

定语从句讲解一．基本介绍❶功能：相当于adj,修饰名词或代词，在句中作定语。

❷位置：被修饰词之后❸先行词：被定语从句修饰的词❹关系词：连接先行词与从句的词称为关系词。

❺确定关系词的步骤：先看先行词，指的是什么；看关系词在充当的成份。

二．特殊用法1.He was looking pleasantly at the children and parcels______filled his bus.2.The village is no longer the one ___it was five years ago. 5.Such books____you bought are useful.23.Which are the books____you bought for me? 6.____ is known,the earth is round.4.There is a room,_____window faces the river. 7.There is lots of air in loose snow,_____can keep the cold out.3高中定语从句练习（整理）1. They talked for about an hour of things and persons _____ they remembered in the factory.A. whichB. thatC. whoD. whom2. We are going to spend this Spring Festival in Beijing, _____ live our grandparents and some relatives.A. whichB. thatC. whoD. where3. There are many areas in the world _____ lack experienced doctors.A. whereB. in whichC. whichD. what4. The years and months _____ we spent together are really wonderful to us all.A. whenB. on whichC. in whichD. that5. _____ has been described above, it is a general rule that solids expand as the temperature increases and contract when they are cooled.A. ItB. AsC. ThatD. Which6. A. who’s B. which C. whose7. Susan is not the brilliant writer _____ she used to be. D. thisA. whichB. thatC. whoD. whom8. I, who _____ your friend, will try my best to help you.A. beB. amC. areD. is9. The size of the audience, _____ we had expected, was well over 1600.A. asB. thatC. whichD. who10. They have started an investigation, _____ are being kept secret.A. whose detailB. whose the detailsC. the details of whichD. the detail of it11. Have you ever asked him the reason _____ may explain his absence?A. whyB. for whichC. whichD. what12. There were two rooms in the beach house, _____ served as a kitchen.A. the smaller of themB. the smallest of whichC. the smaller of whichD. smallest of which13. He imagined various ways _____ he could teach her how to learn English well.A. /B. thatC. in whichD. A , B & C14. The speed _____ light travels is said to be the maximum in the universe.A. in whichB. by whichC. at whichD. from which15. Can you think out a situation _____ this idiom can be used?A. in whichB. thatC. whereD. A & C16. China has hundreds of islands, _____ is Taiwan.A. in which the largestB. its largest of whichC. of which the largestD. which the largest17. We ate in a luxurious restaurant but it wasn’t such a good dinner _____ she had promised us.A. thatB. whichC. asD. what18. They stayed with me for three weeks, _____ they drank all the wine I had.A. whichB. which timeC. during whichD. during which time19. She was dressed in the same way _____ she was when I saw her last time.A. thatB. asC. onceD. in which20. The fire started on the first floor of the hospital, _____ patients are mostly elderly people.A. itsB. whichC. whoseD. their21. The company official _____ I thought would be fired received a raise.A. whomB. whoeverC. whoD. of whom22. Alec asked the policeman _____ he worked to contact him whenever there was an accident.A. with himB. whoC. whomD. with whom23. We are living in an age _____ many things are done on computer.A. at whichB. thatC. whenD. which24. The factory produces half a million pairs of shoes every year, 80% _____ are sold abroad.A. whichB. which ofC. of whichD. of that25. The road conditions there turned out to be very good, _____ was more than we could expect.A. itB. whichC. whatD. that26. He’s such a good teacher _____ we all love and respect.A. thatB. as C who D. whom27. Today, more and more people are concerned about the way _____ the environment is being destroyed.A. whichB. in thatC. in whichD. how28. The old man finally got a chance to visit the school, _____ he used to study, _____ he had beendreaming of for years.A. that…whichB. where…thatC. in which…whatD. where…which29. This is the least interesting book _____ during my holidays.A. that I have ever read itB. what I have ever readC. I have ever readD. which I have ever read30. The result is not the same _____ they had expected, _____ was rather disappointing.A. which…asB. as... thatC. that…whichD. as…which31. We interviewed the old lady, _____ had been killed in the air crash last week.A. whose all childrenB. all her childrenC. all of her childrenD. all of whose children32. There are altogether eleven books on the shelf, _____ are mine.A. of which fiveB. in which fiveC. five of whichD. A & C33. ---Is this dictionary _____ you want to buy?---Yes, this is the very dictionary _____ I need.A. which…thatB. the one…whichC. the one…/D. the one that…which34. I’ll give you my friend’s home address, _______ I can be reached most evenings.A. whichB. whenC. whomD. where35. The friendship is like health, _____ is seldom known until it is lost.A. its valueB. the value of itC. the value of whichD. whose the value36. I can think of many cases _____ students obviously knew a lot of English words and expressions butcouldn’t write a good essay.A. whichB. in whichC. whereD. B & C37. The artist _____ the judge gave a prize is the teacher _____ I have been taught painting for two years.A. from whom…by whomB. to whom…whoC. to whom…by whomD. from whom…who38. American women usually identify their best friend as someone _____ they can talk frequently.A. whoB. asC. about whichD. with whom39. Last night I took a taxi, _____ took me straight home.A. and itB. itC. whichD. A & C40. I shall never forget the days _____ I lived in the countryside with the farmers, _____ has a great effecton my life.A. when…thatB. when…whenC. when…whichD. which…which41. The town _____ you visited last month is the one _____ Einstein was born.A. where…whereB. which…whichC. that…whereD. that...which42. He’s got himself into a dangerous situation _____ he is likely to lose control over the plane.A. whereB. whichC. at whichD. in that43. Tom’s mother kept telling that he should work harder, _____ didn’t help.A. but itB. asC. whichD. A & C44. I’m looking for a present for my mother’s birthday, _____ she can use and at a reasonable price.A. thatB. oneC. whatD. which45. There isn’t much _____ I can do, _____ makes me disappointed.A. that…whichB. which…thatC. that…thatD. which…which46. That e-book is no larger than an ordinary book with a screen _____ you can read novels.A. in whichB. thatC. whereD. of which47. "Who moved my cheese?”, _____ is a best-selling book, is written by Spencer Johnson.A. whichB. thatC. itD. whose48. Shirley said that she would have a two-week holiday in July, _____ I think, is impossible.A. itB. thatC. whenD. which49. It was an exciting moment for these football fans this year, _____ for the first time in years their teamwon the World Cup.A. thatB. whichC. whenD. while50. I was so angry at all _____ he was doing _____ I walked out.A. that…thatB. which…thatC. which…whichD. /…which51. The moment he set his foot in the new country, to his great surprise, he was surrounded by friendlypeople_____ he could turn for help.A. from whomB. to whomC. on whomD. by whom52. It was not until Mum agreed to take her to KFC, _____ was her favorite, _____ the spoilt girl stoppedcrying.A. that…thatB. that…whichC. which…thatD. which…which53. You can use a large plastic bottle, _____ cut off, as a pot to grow flowers in. Which is wrong?A. the top of which isB. whose top isC. its top isD. with its to54. The British are not so familiar with different cultures and ways of doing things, ______is often thecase in other countries.A. thatB. soC. whatD. as55. Keep the drug _____ is out of children reach.A. in a place whereB. whereC. in a place whichD. in which56. When we talk about the cities in United States, the first _____ comes into our mind is New York.A. oneB. cityC. thatD. which57. He arrived in Shanghai in 2003, _____, some time later, he became a teacher.A. whenB. whereC. thatD. which58. The challenge is to create a system, _____ the farmers can teach the world about plant medicine.A. whereB. whichC. whenD. for which59. Jogging on the road was one of the reasons _____ 21 people, including 20 students and 1 teacher, diedand another 16 were injured in the accident in Shanxi Province.A. becauseB. whichC. for whichD. how60. It was in the Beihai Park, _____ they made a date for the first time _____ the old couple told us their love story.A. where…thatB. that…whereC. that…thatD. where…when定语从句Key1. BDCDB 6. CBBAC 11. CCDCD 16. CCDBC 21. CDCCB 26. BCDCD 31. DDCDC 36. DCDDC 41. CADB A 46.CADC A 51.BCCDC 56. CBACA。

英语定语从句讲解及练习1. 什么是定语从句定语从句是英语中一种常用的修饰成分，用于修饰名词或代词，在句中起定语的作用。

2. 定语从句的构成定语从句由关系词引导，关系词可以是关系代词或关系副词。

2.1 关系代词关系代词有：who, whom, whose, which, that。

- who 和 whom 用于修饰人。

- whose 用于修饰所有格。

- which 用于修饰物。

- that 同时可以修饰人和物。

2.2 关系副词关系副词有：when, where, why。

- when 用于修饰时间。

- where 用于修饰地点。

- why 用于修饰原因。

3. 怎么使用定语从句定语从句一般紧跟在被修饰的名词或代词后面，并且在从句中起修饰作用。

关系词所在的位置可以是主语、宾语或介词宾语的位置。

以下是一些例句来说明如何使用定语从句：1. The person who is sitting next to me is my best friend.（坐在我旁边的那个人是我最好的朋友。

）（你知道她为什么没来的原因吗？）3. This is the book which I bought yesterday.（这是我昨天买的书。

）练题：1. Can you lend me the pen ___________ doesn't have ink anymore? (which / who)2. The girl ___________ is standing over there is my sister. (who / what)3. I have a dog ___________ barks all night. (which / whose)请在下面填写正确答案：1. which2. who3. that---> 注意：以上答案仅供参考，实际情况应根据具体语境来确定。