定语从句专项练习题

定语从句专项练习题（通用8篇）

篇1：定语从句专项练习题

A.thatB.whereC.whenD.which

2.What if we meet a situation _________none of us are able to deal with?

A.whereB.in whichC.whatD.that

3.I work in a business almost everyone is waiting for a great chance.A.howB.whichC.whereD.that

4.The position many people want to apply is not easy to get.A.to whichB.for whichC.for thatD.with which

A.whereB.in whichC.whenD.that

6.His point no serious harm is done in such cases has led him to make the same mistake again and again.A.thatB.whereC.whenD.which

7.It was from only a few supplies that she had bought in the village ________ the hostess cooked such a nice dinner.A.that,B.whereC.whenD.which

8.---Where did you meet your former girl friend?

---It was in the university _________ we studied ten years ago.A.whenB.whereC.thatD.what

9.Tom got the first place, __________ obviously made his parents very happy.A.whichB.whatC.thatD.where

10.It this dictionary ___________ you bought the day before yesterday?

A.thatB.whichC.whereD.the one

11.As a boy he was always making things, __________ most were about electricity.A.on whichB.for thatC.of whichD.from what

12.In the Olympics we Chinese team got 16 gold medals, 12 _____ were won by women.A.from whichB.of whichC.in whichD.of what

13.What do you think of the cloth _________ the evening dress is made?

A.for whomB.from whichC.in whatD.of which

14.It is the protection for the trees__________ really matters, rather than how many trees are planted.A.whereB.thatD./D.which

15.I’m reading a new book these days, ___________ written in English.A.itB.thatD.oneD.which

16.They have decided to finish the work in time, __________, I think, is a wise choice.A.thatB.whatC.whichD.whether

篇2：定语从句专项练习题

A.which

B.what

C.as

D.those

2.Isthisthefactory__________youvisitedtheotherday?

A.that

B.where

C.inwhich

D.theone

3.Isthisfactory__________someforeignfriendsvisitedlastFriday?

A.that

B.where

C.which

D.theone

4.Isthisthefactory__________heworkedtenyearsago?

A.that

B.where

C.which

D.theone

5.Thewolveshidthemselvesintheplaces__________couldn’tbefound.

A.that

B.where

C.inwhich

D.inthat

6.Thefreezingpointisthetemperature__________waterchangesintoice.

A.atwhich

B.onthat

C.inwhich

D.ofwhat

7.Thisbookwillshowyou__________canbeusedinothercontexts..

A.howyouhaveobserved

B.whatyouhaveobserved

C.thatyouhaveobserved

D.howthatyouhaveobserved

8.Thereasonis__________heisunabletooperatethemachine.

A.because

B.why

C.that

D.whether

9.I’lltellyou__________hetoldmelastweek.

A.allwhich

B.that

C.allthat

D.which

10.Thattree,__________branchesarealmostbare,isveryold.

A.whose

B.ofwhich

C.inwhich

D.onwhich

11.Ihaveboughtthesamedress__________sheiswearing.

A.as

B.that

C.which

D.what

12.Hefailedintheexamination,__________madehisfatherveryangry.

A.which

B.it

C.that

D.what

13.We’retalkingaboutthepianoandthepianist__________wereintheconcertweattendedlastnight.

A.which

B.whom

C.who

D.that

14.Thegirl__________anEnglishsonginthenextroomisTom’ssister.

A.whoissinging

B.issinging

C.sang

D.wassinging

15.Those__________notonlyfrombooksbutalsothroughpracticewillsucceed.

A.learn

B.who

C.thatlearns

D.wholearn

16.Anyone__________thisopinionmayspeakout.

A.thatagainsts

B.thatagainst

C.whoisagainst

D.whoareagainst

17.Didn’tyouseetheman__________?

A.Inoddedjustnow

B.whomInoddedjustnow

C.Inoddedtohimjustnow

D.Inoddedtojustnow

18.Canyoulendmethenovel__________theotherday?

A.thatyoutalked

B.youtalkedaboutit

C.whichyoutalkedwith

D.youtalkedabout

19.Isthereanything__________toyou?

A.thatisbelonged

B.thatbelongs

C.thatbelong

D.whichbelongs

20.----“Howdoyoulikethebook?”

----“It’squitedifferentfrom__________Ireadlastmonth.”

A.that

B.which

C.theone

D.theonewhat

21.Mr.Zhanggavethetextbooktoallthepupilsexcept__________whohadalreadytakenthem.

A.theones

B.ones

C.some

D.theothers

22.Thetrain__________shewastravellingwaslate.

A.which

B.where

C.onwhich

D.inthat

23.Hehaslostthekeytothedrawer__________thepapersarekept.

A.where

B.inwhich

C.underwhich

D.which

24.Antarctic__________weknowverylittleiscoveredwiththickicealltheyearround.

A.which

B.where

C.that

D.aboutwhich

25.It’sthethirdtime__________latethismonth.

A.thatyouarrived

B.whenyouarrived

C.thatyou’vearrived

D.whenyou’vearrived

26.Itwasin1969__________theAmericanastronautsucceededinlandingonthemoon.

A.that

B.which

C.when

D.inwhich

27.Maythefourthistheday__________weChinesepeoplewillneverforget.

A.which

B.when

C.onwhich

D.aboutwhich

28.WearegoingtospendtheSpringFestivalinGuangzhou,__________livemygrandparentsandsomerelatives.

A.which

B.that

C.who

D.where

29.Thehotel__________duringourholidaysstandsbytheseaside.

A.westayedat

B.wherewestayedat

C.westayed

D.inthatwestayed

30.Isitinthatfactory__________“RedFlag”carsareproduced?

A.inwhich

B.where

C.which

D.that

31.ItistheSuezCanal__________separatesAsia__________Africa.

A.which,to

B.where,from

C.that,from

D.that,with

32.Underthebridge,however,almostdirectlybelow,__________wasasmallcanoe,withaboyinit.

A.there

B.where

C.it

D.which

33.Heisnot__________afool__________.

A.such,asheislooked

B.such,ashelooks

C.as,asheislooked

D.so,ashelooks

34.Isthatthereason__________youareinfavouroftheproposal?

A.which

B.what

C.why

D.forthat

35.HemustbefromAfrica,__________canbeseenfromhisskin.

A.that

B.as

C.who

D.what

参考答案：

1—5AADBA6—10ABCCA11—15AADAD

16—20CDDBC21—25ACBDC26—30AADAD

篇3：定语从句专项练习题

课型:语言知识课。

一、教学目标

知识目标:1.熟悉定语从句的概念、句法结构和作用, 以及先行词和关系代词的位置和作用。

2.掌握关系代词that, which, who, whose的基本用法。

能力目标: 能够在真实的交际环境中正确应用关系代词that, which, who, whose引导的定语从句。

德育目标:1.通过模仿、操练和观察, 学会演绎和归纳定语从句的基础知识。

2.通过游戏, 学会合作, 建立自信心和集体荣誉感, 以及综合运用所学知识解决实际问题的能力。

情感目标:通过学习调动学习积极性, 使学生体会到英语的趣味和实用性。

二、重点难点

1.了解定语从句的句法作用和结构, 特别是关系代词的正确使用;

2.作定语用的关系代词whose的用法。

三、学情分析

语法向来是学生头痛的一项内容, 而定语从句在历来的高考试题中都有所体现, 因此, 掌握这一内容显得尤为重要。我所教的班级学生为普通生, 英语的基础较差, 传统的语法教学基本以呈现理论为主再辅以练习, 相对枯燥, 学生兴趣不够, 容易分散注意力, 所以应融入一些新的教学元素。 这个年龄段的学生争强好胜, 喜欢新事物, 于是我考虑借用大家感兴趣的话题激发学生热情, 增强学习效果。

四、教学方法

运用数学中简单的集合概念帮助解决英语中的复杂语法。 以学生为主体, 尝试创新思维, 联系生活采用讨论、协作、探究的小组活动和语法规则自主归纳演绎的教学模式, 引导学生灵活运用所学语法知识。

五、教学手段

利用多媒体计算机、 网络资源、 自制音像等创设教学情境、问题情境, 扩大教学容量, 增强教学的趣味性和时效性。

六、课前准备

1.布置学生找出前面课文中出现的定语从句。

2. 学生课前预习定语从句的讲解和试做导学案上的习题。

3.教师准备相关多媒体课件。

七、教学课时

一课时 (40分钟)

八、教学过程

Step1.通过数学课中的交集概念导入本节课。 两个句子没有一点关系不可能结合在一起, 这与数学课程中的交集概念非常相似, 这样既能激发学生的兴趣, 又能使定语从句合并过程具体、直观。

Step2.教学过程:

1. 让学生观察例句:Mr.Smith is a teacher.He is very strict.同时提醒学生思考数学交集这个概念。 让学生回答观察的结果, 在学生回答出正确答案之后, 用红色粉笔画出两个句子的相同部分:Mr.Smith is a teacher.He is very strict.总结:先要找到两个句子连接的纽带、桥梁。 归纳为:找。

2.思考如何把这两个句子连接在一起, 引导学生思考, 提出问题:既然两个划线部分意思一样, 能不能替换? He在句子中承担什么成分? 用关系代词还是关系副词替换? 如果用关系代词替换它, 应该用哪一个关系代词? 替换之后, 句子就会变成:Mr.Smith is a teacher.Who is very strict.总结:要用关系词完全替换划线单词归纳为:替。

3.在前面两步的基础之上, 合并定语从句就水到渠成, 把替换的句子跟在另外一个划线单词后面, 这样定语从句“Mr.Smith is a teacher who is very strict.” 就做出来了。 这一步归纳为:跟。 最后提出问题:划线的a teacher在定语从句中把它称作什么? 定语从句的主句是哪一部分? 定语从句的从句是哪一部分? 先行词等于关系词吗? 总结:1.定语从句的四大要件:主句、从句、先行词、关系词。2.先行词等于关系词。3.以小组形式做练习巩固所学语法知识。

九、课后反思

以往常常采取用“定义—讲解—释疑—练习”的方式教授定语从句, 很难提供利用所学的语法项目进行真实交际的机会。 我根据新课改的理念和多年的教学实践, 深入剖析学情和语言习得的规律, 大胆尝试语法教学的形式, 坚持做到以下四点:一是归纳法与演绎法相结合;二是将语法教学放在真实情境中进行;三是在坚持提高语言交际的流利性的同时, 注意提高语言的准确性, 鼓励学生张口说, 不怕犯错误;四是语法讲解简明扼要, 重点突出。

本课是学生进入高中第一次正式学习定语从句, 学生虽然在初中学习时偶尔接触到定语从句的句子, 有一定的语感;但是对于句法结构并不了解, 尤其是定语从句在高中英语学习阶段是难点和重点。 因此, 在本节课上帮助学生清晰地掌握定语从句的基本概念、结构, 以及了解和初步把握关系词的作用和选择尤为重要。 据此, 我将本课设计为四个环节 (分四个层次) :概念、结构、功能、操练。 每一环节都遵循“呈现—发现—归纳—实践—活用”的教学模式, 同时增强练习的趣味性和生活化, 有效激发了学生的学习兴趣和自主探究精神, 打开了通往定语从句的大门。 通过不同的形成性评价表明, 教学效果良好。 课堂教学的“留白”和“悬念”也很重要, 这节课中我有意地在例句中出现只用which和whom的情况, 没有刻意强调总结, 也特意留出that是否有特别用法的悬念, 留给学生去思考、去发现, 课堂教学虽结束, 但学生的思考才开始延伸。

篇4：定语从句专项练习

A. two of whom sentB. two of them sent

C. two of whom are sentD. two of them sending

2. He reached London in 1996，____，some time later，he became a famous actor.

A. whereB. whenC. whichD. that

3. ——Is that the small town you often refer to?

——Right，just the one ____ you know I used to work for years.

A. thatB. whichC. whereD. what

4. Have you taken down everything ____ Mr. Smith has said?

A. whichB. whatC. whateverD. that

5. His parents wouldn’t let him marry anyone ____ family was poor.

A. of whomB. whomC. of whoseD. whose

6. A football fan(球迷) is ____ has a strong interest in football.

A. a thing thatB. something thatC. a person whoD. what

7. The matter ____ you were arguing about last night has been settled.

A. thatB. whatC. whyD. for which

8. They talked for about an hour of things and persons ____ they remembered in the school.

A. whichB. thatC. whoD. whom

9. He is the boy ____ you wanted to find.

A. thatB. whoC. whomD. /

10. They asked him to tell them everything ____ he saw at the front.

A. whatB. thatC. whichD. where

11. I’ll tell you ____ he told me last night.

A. all which B. all whatC. that allD. all

12. A child ____ parents are dead is called an orphan.

A. whoB. who’sC. whoseD. which

13. He has lost the key to the drawer ____ the papers are kept.

A. where B. on whichC. under whichD. which

14. He was born in the year ____ the Anti-Japanese War broke out.

A. whichB. whenC. on whichD. during which

15. They are talking about persons ____ they knew when they were young.

A. thatB. whichC. whoD. whom

16. This is the man ____ last night.

A. whom I saw himB. whom I saw

C. which I sawD. who I saw him

17. We travelled together as far as Chicago，____ we parted.

A. whenB. whichC. whyD. where

18. Which of the two cows ____ you keep produces more milk?

A. thatB. whichC. whomD. what

19. The last place ____ was the Science Museum.

A. we visitedB. where we visited

C. which we visitedD. we went

20. Peter lives in the room ____ window opens to the south.

A. whose B. thatC. whichD. /

21. Did she tell you anything ____ had happened to her?

A. it B. that C. whatD. which

22. This is the girl ____ I believe was the driver of the car.

A. whoB. whomC. in whomD. /

23. I’ve read all the books ____ were borrowed from the library.

A. theyB. whereC. / D. that

24. China is a country ____ has a long history.

A. itB. whichC. / D. where

25. Did you tell your mother all ____ you had seen on the way home?

A. whatB. whyC. thatD. which

26. It was Tom ____ cat died____ cried all day long.

A. his； hasB. whose； heC. that； who D. whose； that

27. This is just the place ____ I am longing to visit these years.

A. that B. where C. in which D. to where

篇5：英语语法定语从句专项自测试题

1. They are talking about things and persons ___ they knew when they were young.

A. that B. which C. who D. whom

2. This is the man ___ last night.

A. whom I saw him B. whom I saw

C. which I saw D. who I saw him

3. The seventeenth century was one ___ many advances were made in science.

A. that B. which C. where D. when

4. We travelled together as far as Chicago, ___ we parted.

A. when B. which C. why D. where

5. The reason ___ Im writing is to tell you about a party on Saturday.

A. because B. why C. for D. as

6. Author Edith Wharton thoroughly understood the society ___.

A. she had grown up in it B. which had she grown up in

C. she had grown up D. in which she had grown up

7. This is one of the best books ___.

A. that have ever been written B. that has ever been written

篇6：高中定语从句练习题

A. of it B. of which C. of that D. whose

2. The engineer _____ my father is talking has just come from abroad.

A. with whom B. with who C. with which D. that

3. He lives in a hotel, _____ is only five minutes’ walk from here.

A. that B. which C. in which D. where

4. Is there anything _____ I can do for you?

. A. which B. who C. as D. that

5. The speaker will tell us about some writers and their works _____are known to us.

A. which B. that C. as D. who

6. This is the reason _____ they are all against the plan.

A. which B. that C. why D. what

7. It was not until late in the evening _____ the traveler found a hotel.

A. which B. that C. as D. where

8. I didn’t like the way _____ she spoke to me.

A. which B. that C. how D. as

9. This is _____ I can do for you right now.

A. which B. that C. what D. as

10. It was at our college library _____ I borrowed the novel.

A. which B. in which C. that D. where

11. I have seen trees, _____ open at sunrise and close at sunset.

A. which the leaves B. of which leaves C. whose leaves D. its leaves

12. All _____ is needed is a supply of oil.

A. the thing B. that C. what D. which

13. The foreign guests, _____ were scientists, were warmly welcomed at the airport.

A. most of whom B. most of them C. most of which D. most of those

14. On the train I saw a student _____ I thought was your sister.

A. who B. whom C. which D. that

15. Is the river _____ through the town very long?

A. flows B. that flows C. which flow D. the one flows

16. Is this college _____ they went to last year?

A. that B. which C. the one D. the one what

17. Is this the university _____ you visited last time?

A. that one B. which C. the one D. the one what

18. I’d like to tell you _____ I saw in the exhibition.

A. which B. that C. what D. /

19. I hope that the little _____ I have been able to do has been of some use.

A. which B. that C. what D. for which

20. Who _______ has common sense will do such a thing?

A. which B. that C .whose D. whom

21 The bike and its rider _____ had knocked down the boy were taken to the police.

A. who B .that C. which D. whom

22. Put the letter ______ he can find it easily.

A. in which B. at which C. where D. which

23. This is the very letter _____ I am looking for .

A. which B. that C. as D. what

24. Tom didn’t attend the meeting, ________ we expected.

A. where B. that C. as D. what

25. I will give you such information _______ will help you.

A. which B. that C. as D. what

26. This is the best hotel in the city ____ I know.

A. which B. that C. where D. it

27. The lady ____ is a woman scientist.

A. whom you spoke B. with which you spoke C. whom you said to D. you spoke to

28. This is the third week _____ the dustmen haven’t come for the rubbish.

A. that B. when C. which D. on which

29. He is the only one of the students _________ the truth.

A. who know B. who knows C. that know D. who are knowing

30. Did they find they went back________ ?

A. where had they been B. where were they C. where they had been D. where they were

31. To get the job started, ______ I need is your permission.

A. only what B. all what C. all that D. only that

32. My father bought me several books, but _____ was interesting.

A. most of them B. none of them C. none of which D. neither of which

33. “Thirty-nine Steps” is one of the most exciting films ____ directed by Alfred Hotchcock.

A. which was B. that was C. that were D. which were

34. All of the plants now raised on farms have been developed from the plants _____ wild.

A. once they grew B. they grew once C. that once grew D. once grew

35. Those _____ were not fit for their work could not see the beautiful clothes.

A. who B. that C. which D. whose

36. The children themselves were calm enough; _____ the parents that got into a

panic. A. in spite of B. those were C. it was D. however

37. It is many years _____ we met last inLondon.

A. since B. when C. that D. which

38. She’ll be on the same train _____ I am on today.

A. as B. like C. with D. that

39. When people talk about the cities of US, the first _____ comes into mind isNew York.

A. city B. of them C. one D. that

40. Is there anyone in your class _____ family is in the city?

A. which B. whose C. what D. who

41. He hasn’t got enough money with _____ he can buy the computer.

A. that B. which C. it D. whom

42. Winter is the time of year _____ the days are short and nights are long.

A. that B. which C. when D. whose

43. Football, _____ is a very interesting game, is played all over the world.

篇7：初中定语从句练习题

A. which B. what C. as D. those

2. Is this the factory __________ you visited the other day?

A. that B. where C. in which D. the one

3. Is this factory __________ some foreign friends visited last Friday?

A. that B. where C. which D. the one

4. Is this the factory __________ he worked ten years ago?

A. that B. where C. which D. the one

5. The wolves hid themselves in the places __________ couldn’t be found.

A. that B. where C. in which D. in that

6. The freezing point is the temperature __________ water changes into ice.

A. at which B. on that C. in which D. of what

7. This book will show you __________ can be used in other contexts..

A. how you have observed B. what you have observed

C. that you have observed D. how that you have observed

8. The reason is __________ he is unable to operate the machine.

A. because B. why C. that D. whether

9. I’ll tell you __________ he told me last week.

A. all which B. that C. all that D. which

10. That tree, __________ branches are almost bare, is very old.

A. whose B. of which C. in which D. on which

11. I have bought the same dress __________ she is wearing.

A. as B. that C. which D. what

12. He failed in the examination, __________ made his father very angry.

A. which B. it C. that D. what

13. We’re talking about the piano and the pianist _______ were in the concert we attended last night.

A. which B. whom C. who D. that

14. The girl ________ an English song in the next room is Tom’s sister.

A. who is singing B. is singing C. sang D. was singing

15. Those _______ not only from books but also through practice will succeed.

A. learn B. who C. that learns D. who learn

16. Anyone ________ this opinion may speak out.

A. that against B. that against C. who is against D. who are against

17. Didn’t you see the man ________?

A. I nodded just now B. whom I nodded just now

C. I nodded to him just now D. I nodded to just now

18. Can you lend me the novel ______ the other day?

A. that you talked B. you talked about it

C. which you talked with D. you talked about

19. Is there anything _______ to you?

A. that is belonged B. that belongs

C. that belong D. which belongs

20. ---- “How do you like the book?”

---- “It’s quite different from _______ I read last month.”

A. that B. which C. the one D. the one what

21. Mr. Zhang gave the textbook to all the pupils except _______ who had already taken them.

A. the ones B. ones C. some D. the others

22. The train _______ she was travelling was late.

A. which B. where C. on which D. in that

23. He has lost the key to the drawer _______ the papers are kept.

A. where B. in which C. under which D. which

24. Antarctic _______ we know very little is covered with thick ice all the year round.

A. which B. where C. that D. about which

25. It’s the third time _______ late this month.

A. that you arrived B. when you arrived

C. that you’ve arrived D. when you’ve arrived

26. It was in 1969 _______ the American astronaut succeeded in landing on the moon.

A. that B. which C. when D. in which

27. May the fourth is the day ______ we Chinese people will never forget.

A. which B. when C. on which D. about which

28. We are going to spend the Spring Festival in Guangzhou, _______ live my grandparents and some relatives.

A. which B. that C. who D. where

29. The hotel _______ during our holidays stands by the seaside.

A. we stayed at B. where we stayed at

C. we stayed D. in that we stayed

30. Is it in that factory _______ “Red Flag” cars are produced?

A. in which B. where C. which D. that

31. It is the Suez Canal _______ separates Asia ______ Africa.

A. which, to B. where, from

C. that, from D. that, with

32. Under the bridge, however, almost directly below, _______ was a small canoe, with a boy in it.

A. there B. where C. it D. which

33. He is not ______ a fool _______.

A. such, as he is looked B. such, as he looks

C. as, as he is looked D. so, as he looks

34. Is that the reason _______ you are in favour of the proposal?

A. which B. what C. why D. for that

35. He must be from Africa, _______ can be seen from his skin.

A. that B. as C. who D. what

36. He has two sons, _______ work as chemists.

A. two of whom B. both of whom

C. both of which D. all of whom

37. I, _______ your good friend, will try my best to help you out.

A. who is B. who am C. that is D. what is

38. He is a man of great experience, _______ much can be learned.

A. who B. that C. from which D. from whom

39. ---- Do you know the town at all?

--- No, this is the first time I ________ here.

A. was B. have been C. came D. am coming

40. I don’t like _______ you speak to her.

A. the way B. the way in that

C. the way which D. the way of which

41. The two things _______ they felt very proud are Jim’s gold watch and Della’s hair.

A. about which B. of which

C. in which D. for which

42. The dinner was the most expensive meal we ______.

A. would have B. have had

C. had never had D. had ever had

43. Do you know which hotel _______?

A. she is staying B. she is staying in

C. is she staying D. is she staying in

44. There is only one thing _______ I can do.

A. what B. that C . all D. which

45. Who can think of a situation ________ this idiom can be used?

A. which B. that C. where D. in that

46. I have many books, some of _______ are on chemistry.

A. them B. that C. which D. those

47. They were interested _______ you told them.

A. in which B. in that

C. all that D. in everything

48. The astronaut did many experiments in the spaceship, ________ much

help for knowing space.

A. which we think it is B. which we think are of

C. of which we think is D. I think which is of

49. The great day we looked forward to _______ at last.

A. come B. came C. coming D. comes

50. I like the second football match _______ was held last week.

A. which B. who C. that D. /

[参考答案]

1—5 AADBA 6—10 ABCCA 11—15 AADAD 16—20 CDDBC 21—25 ACBDC 26—30 AADAD

篇8：定语从句专项练习题

[例句呈现]仔细阅读A、B两组句子，注意观察它们的不同点。

A.

1.The girl who came this morning is my sister.

2.Those who wish to go to the park must be at the gate by 7:50 am.

3.After living in Paris for fifty years he returned to the small town where he grew up as a child.

B.

1.Mr.Shang, who came to see me yesterday, is an old friend of my father’s.

2.Mary, whose children are at school all day, is trying to get a job.

3.He said that he had never seen her before, which was not true.

4.The college, where he studied for four years, is a famous one.

5.The 8:30 train, which is usually very punctual, was late today.

[小结]通过以上例句，我们可以发现：A组是限制性定语从句，B组是非限制性定语从句。限制性定语从句与非限制性定语从句主要有以下几个方面的区别。

1. 形式不同

主句和限制性定语从句之间不用逗号隔开，而主句与非限制性定语从句之间通常用逗号隔开。

2. 作用不同

限制性定语从句是先行词在意义上不可缺少的定语，如果去掉，主句的意思就不完整或失去意义。这种从句和主句的关系十分密切，写时不用逗号分开。限制性定语从句中作宾语的关系代词常可省略，如：

a) What is the name of the tall woman who is standing there?

站在那边的那个女人叫什么名字?

b) Toronto is a city (that) I’ve always wanted to visit.

多伦多是我常想去参观的一个城市。

而非限制性定语从句和主句关系不十分密切，只是对先行词作些附加的说明，如果去掉，主句的意思仍然清楚。这种从句和主句之间往往用逗号分开，一般不用that引导。在非限制性定语从句中，关系词不可省略。如：

a) Rome, which is the capital of Italy, has a very long history.

意大利的首都罗马历史非常悠久。

b) Yesterday I met Professor King, who came from the University of London.

昨天我遇见金教授，他是从伦敦大学来的。

c) He lent me a dictionary, which was just what I needed.

他借给我一本词典，这正是我所需要的。

3. 先行词不同

大多数限制性和非限制性定语从句的先行词往往为某一个词或短语，而特殊场合非限制性定语从句的先行词也可为整个主句，此时非限制性定语从句常由which引导。

eg.A middle-aged woman killed her husband, which frightened me very much.

一个中年女子杀害了其丈夫，这事令我十分恐惧。

分析：从语境可知，令我恐惧的内容应为中年女子杀害了其丈夫这整件事，因此先行词为整个主句，此时应由which引导定语从句。

eg.A five-year-old boy can speak two foreign languages, which surprises all the people present.

一个五岁的男孩会讲两门外语，令所有在场的人感到非常惊讶。

分析：从语境可知，令所有在场的人感到惊讶的内容是一个五岁男孩会讲两门外语这整件事，因此先行词为整个主句，此时应由which引导非限制性定语从句。

4. 关系词不同

限制性定语从句可以由that, which, who (m), where, when, why及“介词+which/whom”等来引导，而非限制性定语从句通常由who (m), whose, which, when, where及“介词+which/whom”引导。

关系代词whom在限制性定语从句中作宾语时可用who代替whom，但在非限制性定语从句中作宾语时不可用who来代替。

eg.This is the girl whom I met in the street.

这是我在街上遇到的女孩。

先行词“the girl”在限制性定语从句中作宾语，可用who代替whom。

eg.A young man had a new girl friend, whom he wanted to impress.

一个年轻的小伙子新交了一个女朋友，他想给她留下深刻印象。

先行词“a new girl friend”在非限制性定语从句中作宾语，不可用who代替whom。

最后我们不妨比较一下以下两个句子：

a) She has two brothers who are working in the city.

她有两个弟弟在这个城市工作。(其意思是强调：She hasmore than two brothers.)

b) She has two brothers, who are working in the city.

她有两个弟弟，他们在这个城市工作。(而这句是说：Shehas only two brothers.)

下面两个句子只有一个逗号之差，意义却大相径庭。

a) He will wear no clothes which will make him different from others.

他不会穿一些使他显得与众不同的衣服。

b) He will wear no clothes, which will make him different from others.