定语从句跟名词性从句区别辨析练习(含答案)
定语从句跟其他名词性从句区别辨析练习（含答案）1. A.①The young man found the gold watch _______he lost.C.②The young man found the gold watch _______he lost it.A. thatB. in whichC. whereD. there2. D.①The company and the effect _______ brought about did great good toour business in western countries.A.②The company and the effect _______ it brought about did great good toour business in western countries.A. thatB. whatC. to whichD. it3. A.①Use your own mind. Never be ready to believe anything _______ otherpeople believe.C.②Use your own mind. Never be ready to believe anything _______ otherpeople believe itA. thatB. whichC. becauseD. when4.D.①Is this museum_______ they visited yesterday?A.②Is this the museum_______ they visited yesterday?B.③Is this the museum_______ they visited some ancient weapons yesterday?A. thatB. whereC. oneD. the one5. A.①Next month, ______ you’ll spend in your hometown, is coming.C.②Next month, ______ you’ll be in your hometown, is coming.A. thatB. whichC. whenD. where6. C.①Yesterday our chemistry teacher asked so difficult a question________ puzzled all of us.A.②Yesterday our chemistry teacher asked so difficult a question ________it puzzled all of us.A. thatB. whichC. asD. what7. B.①This is one of the best films _______this year.C.②This is the one of the best films _______this year.A. have been shownB. that have been shownC. that has been shownD. which has been shown8. C.①_______, paper was first made in China.A.②_______that paper was first made in China.B.③_______is that paper was first made in China.A. It is known to us allB. What is known to us allC. As is known to us allD. That is known to us all9. A.①When Christopher Columbus reached the place _______ is now the USA,he called the people of the new world “Indians”.D.②When Christopher Columbus reached _______is now the USA, he called thepeople of the new w orld “Indians”.A. whichB. whereC. thereD. what10. B.①The town is no longer the one_______ it was 10 years ago, _______it was quite dirty.D.②The town is no longer ______ it was 10 years ago； _______ it was quitedirty.B.③The town is no longer the same _______ it was 10 years ago, _______it was quite dirty.A. that; thenB. as; whenC. that; whenD. what; then11. C.①This is the very way_______ he did the experiment.C.②This is the very way_______ he told me yesterday.A.③This is _______ he did the experiment.A. howB. by whichC. thatD. which12. D.①The reason _______ he failed was that he hadn’t taken my advice.B.②The reason for _______ he failed was that he hadn’t taken my advice.A.③The only reason _______ he could give us was that he failed to catchthe bus.A. thatB. whichC. becauseD. why13.C.①You should put the dictionary _______ you could find it easily.C.②You should put the dictionary on the desk_______ you can find it easily.A. whichB. in whichC. whereD. there14.C.①It is the house_______ I met the young man.A.②It was in the house_______ I met the young man.A. thatB. whichC. whereD. there15. C.①It was 7:00_______ I arrived in Beijing.A.②It was at 7:00_______ I arrived in Beijing.A. thatB. whichC. whenD. on which16. A.①He said nothing_______ made me angryB.②He said nothing, _______ made me angryC.③He said nothing, _______ had been expected.A. thatB. whichC. asD. it17. A.①The Chicago Bulls used to be made up of the best basketball playersin the States, _______ are Black Americans.B.②The Chicago Bulls used to be made up of the best basketball playersin the States, _______ Black Americans.B.③The Chicago Bulls used to be made up of the best basketball playersin the States, and_______ are Black Americans.A. most of whomB. most of themC. most of whichD. most of it18. C.①—Why did he say so?—Sorry, I don’t understand _______ he said.B.②—Why did he say so?—Sorry, I don’t understand _______ he said meansA. all whatB. what allC. all thatD. that all19. C.①Computers must be of great use to ________ do the scientific research.A.②Computers must be of great use to ________ doing the scientificresearch.A. thoseB. whoC. those whoD. whomever20.B.①You can use a larger plastic battle, _______ is cut off, as a potto grow flowers in.D.②You can use a larger plastic battle, _______ cut off, as a pot to growflowers in.A. the topB. whose topC. whose the topD. with its top。
高中英语名词性从句练习及定语从句(附答案)
一、名词性从句精华练习1. I read about it in some book or other. Does it matter ___________ it was?A. where B what C how D. which2. She’d like to offer money to ________ needs it to continue his or her study.A. whomB. whoC. whoeverD. whomever3. ---If you are admitted to a key university, _________ as a prize?--- I’m looking for a cell phone.A. What you expect your father will offer youB. Do you expect what your father will offer youC. What do you expect will your father offer youD. What do you expect your father will offer you4. Yesterday he sold out all his stamps at ____ he thought was a reasonable price.A. thatB. whichC. whatD. as5. Generally speaking, ____ we have seen seems more believable than ____ we have been told.A. what; thatB. what; whatC. that; whatD. that; that6. After three days’ waiting, there was a little doubt in the mother’s mind _______ the police could find her lost child.A. howB. thatC. whereD. whether7 development” is a question _______ we can continue developing the world without damaging the environment.A. whyB. whenC. thatD. how8. We’d like to do _______ we can _________ the poor.A. how; helpB. all; to helpC. whatever; helpD. however; to help9. My parents used ________they had to get a new car for my brother.A. whichB. all whatC. whatD. 不填10. She was so angry at all ________ he was doing _________ she stayed up all night.A. that; thatB. that; whichC. what; thatD. what; as11. After _________ seemed ages, the newsman disclosed the facts.A. thereB. whichC. whatD. that12. Our school is no longer _________ it was 10 years ago, _________ it was not well equipped.A. what; whichB. that; whichC. what; whenD. that; where13. Our bad living habits will destroy the earth. Only by changing ________we live can we save the earth.A. thatB. whatC. howD. where14. Thinking that you know _________ in fact you don’t is a serious mistakeA. whatB. thatC. whenD. however15. Energy is _________ makes things work.A. whatB. everythingC. somethingD. anything16. One of the men held the view __________the book said was right.A. that whatB. what thatC. thatD. whether17. I think that this meal was well worth ________ was charged for it.A. thatB. whatC. whichD. how many18. Do you think the reason ________ he gave is believable?A. for whichB. whichC. whyD. what19. Although he knew little about the large amount of work done in the field, he succeeded ________ other more well-informed experimenters failed.A. whichB. thatC. whatD. where20. Although Anne is happy with her success she wonders________ will happen to her private life.A. itB. thatC. whatD. this21. The news has spread all over the country ________ the spaceship succeeded in returning to the earth.A. thatB. whichC. whetherD. what22. You can choose ________ book you like among these.A. no matter whatB. whateverC. whoseD. whichever23. Is this research center ________ we visited the modern equipment last year?A. whereB. thatC. the oneD. which24. Loulan city is not at all _______a traveler who has never seen the desert before can expect.A. whatB. that C .which D. where25. What the doctor is uncertain about is ______ my mother will recover from the serious disease soon.A. whenB. howC. whetherD. why26. We should buy our daughter a computer in ______ it can help to improve her English.A. whichB. thatC. whatD. whom27. I wish to have a friend with ______ shares my hobbies and interests.A. whomeverB. no matter whoC. whoeverD. anyone28. Why don’t you bring _______ to his attention that you are too busy to do it.A. thisB. whatC. thatD. it29. The task required _______ did it ______ careful and brave enough.A. who; isB. whom; wasC. whomever; wereD. whoever; be30. We wrote a letter of thanks to _______ had helped us.A. whoB. thoseC. whomD. whoever31.--- What are you anxious about?--- ___________.A. Whether we can succeedB. If we succeedC. Do you succeedD. That we can succeed32. I just don’t understand_______ that prevents so many Americans from being as happy as one might expect.A .why it does B. what it does C. what it is D. why it is16.The result of the experiment was very good, __________ we hadn’t e xpect. (2000北京春)A.whenB.thatC.whichD.what17.Have you seen the film Titanic, __________ leading actor is world fa mous? (2001上海春)A.itsB.it’sC.whoseD.which18.John said he’d been working in the office for an hour, __________ w as true. (2001北京春)A.heB.thisC.whichD.who19.Is this the reason __________ at the meeting for his carelessness in h is work? (2002上海春)A.he explainedB.what he explainedC.how he explainedD.why he explained20.The famous basketballer, __________ tried to make a comeback, attrac ted a lot of attention. (2002北京春)A.whereB.whenC.whichD.who21.We are living in an age __________ many things are done on compu ter. (2003北京春)A.whichB.thatC.whoseD.when22.We will be shown around the city: schools, museums, and some other places, __________ other visitors seldom go. (2002北京)A.whatB.whichC.whereD.when23.York, __________ last year, is a nice old city. (2003北京)A.that I visitedB.which I visitedC.where I visitedD.in which I visited24.Luckily, we'd brought a road map without __________ we would have lost our way. (2004北京春)A.itB. thatC.thisD.which25.The journey around the world took the old sailor nine months, _____ _____ the sailing time was 226 days. (2004广西卷)A.of whichB.during whichC.from whichD.for which26.The factory produces half a million pairs of shoes every year, 80% _ _________are sold abroad. (2004辽宁卷)A.of whichB.which ofC.of themD.of that27.There are two buildings, __________stands nearly a hundred feet high. (2004湖北卷)A.the largerB.the larger of themC.the larger one thatD.the larger of which28.The English play __________ my students acte d at the New Year’s p arty was a great success. (2004全国卷)A.for whichB.at whichC.in whichD.on which.假设你叫李华，是一家英文杂志社的心理咨询师。
高中英语名词性从句与定语从句、同位语从句综合单选题20题(答案解析)
高中英语名词性从句与定语从句、同位语从句综合单选题20题(答案解析)1.The book that he is reading is about a historical event which/that had a great impact on the world.A.thatB.whichC.whoD.whose答案：B。
本题考查定语从句。
先行词是historical event，在从句中作主语，所以用which 或that。
又因为前面已经有了that，为避免重复，所以选which。
2.The news that he told me is very exciting.A.thatB.whatC.whichD.when答案：A。
本题考查定语从句和名词性从句的区别。
that he told me 是定语从句，修饰news，that 在从句中作宾语。
what 不能引导定语从句，which 要有先行词在从句中作主语或宾语，when 是引导时间状语从句的，都不符合题意。
3.The question whether we should go on a picnic or not depends on the weather.A.thatB.whetherC.ifD.what答案：B。
本题考查名词性从句中的同位语从句。
question 后面的同位语从句用whether 引导，表示“是否”，if 不能引导同位语从句，that 和what 也不符合题意。
4.The place where he was born is a small town.A.thatB.whereC.whichD.when答案：B。
本题考查定语从句。
先行词是place，在从句中作地点状语，所以用where。
that 和which 在定语从句中作主语或宾语，when 引导时间状语从句，都不符合题意。
5.The reason why he was late is that he missed the bus.A.thatB.whyC.becauseD.for which答案：B。
2019届高考英语总复习(练习)：专题2第8讲 定语从句和名词性从句 Word版含答案
第八讲定语从句和名词性从句定语从句句子结构细辨别Ⅰ示之以范 ____________________________________________________原则这样运用1．(2017·全国卷Ⅲ)But Sarah，____________ has taken part in shows along with top models, wants to prove that she has brains as well as beauty.who 解析：所填词引导非限制性定语从句，并在从句中作主语，指人，故用who。
2．(2017·浙江卷6月)Pahlsson and her husband now think the ring probably got swept into a pile of kitchen rubbish and was spread over the garden, ____________ it remained until the carr ot’s leafy top accidentally sprouted(生长) through it. where 解析：所填词引导非限制性定语从句，并在从句中作状语，先行词是表示地点的the garden，故填where。
3．(2017·天津卷)My eldest son，____________ work takes him all over the world，is in New York at the moment.whose 解析：所填词引导非限制性定语从句，并在从句中作work的定语，故用whose。
4．(2017·全国卷Ⅲ)Around me in the picture are the things they were very important in my life at that time: car magazines and musical instruments.____________________ they→that/which解析：分析句子结构可知，things后是定语从句，引导词在从句中作主语，指物，应用that或which。
名词性从句与定语从句区分练习题
名词性从句与定语从句区分练习题在英语语法学习中，名词性从句和定语从句是两个重要且容易混淆的概念。
为了帮助大家更好地理解和区分它们，下面我们通过一系列练习题来进行深入探讨。
一、选择题1、 The news ＿_____ he told me yesterday is very excitingA thatB whatC whenD where在这个句子中，“he told me yesterday”是一个定语从句，修饰先行词“the news”。
先行词在从句中作宾语，所以关系词可以用that 或which，选项 A 正确。
2、＿_____ we need is more timeA WhatB ThatC WhichD How这是一个主语从句，“we need”缺少宾语，所以用 what 引导，选项A 正确。
3、 The place ＿_____ I grew up is a small villageA thatB whereC whichD when此句中，“I grew up”是一个定语从句，先行词“the place”在从句中作地点状语，所以用 where 引导，选项 B 正确。
4、 It is still a question ＿_____ we shall have our sports meetingA ifB thatC whenD which这是一个同位语从句，解释说明“question”的具体内容，“we shall have our sports meeting”句子成分完整，所以用 when 引导，选项 C 正确。
5、 This is the book ＿_____ I have been looking forA whichB thatC whomD whose“＿_____ I have been looking for”是定语从句，先行词“the book”在从句中作宾语，关系词可以用 which 或 that，选项 A、B 均正确。
名词性从句与定语从句的专门讲解及配套练习题(附答案)
语法系列复习专题-----定语从句、名词从句（一）定语从句：一、基本概念：在复合句中，修饰某一名词或代词的,起定语从句的作用句子叫定语从句。
如：Do you know the man who spoke at the meeting just now?That is the house where he lived ten years ago.定语从句所修饰的词叫先行词；定语从句一般用关系代词或关系副词来引导，关系词放在先行词与定语从句之间起连接作用，同时又作从句中的一个成分。
引导定语从句的关系代词有：that, who, whom, whose, which;关系副词有：when, where, why.关系词的作用：1.连接句子2.代替先行词3.在句子中担当成分二、关系词的用法：（一）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 (whom/who/that) we have just seen is a famous writer.Where is the book (which/that) 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：(a) He is the man whose car was stolen last week.(b) 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（如上a句），又能作宾语（如上b句）。
高一英语名词性从句区分辨析练习题40题(答案解析)
高一英语名词性从句区分辨析练习题40题(答案解析)1._____ makes the book so fascinating is its vivid descriptions.A.WhatB.ThatC.WhichD.Who答案解析：A。
“What makes the book so fascinating”是主语从句，what 在从句中作主语，表示“使这本书如此迷人的东西”。
that 在名词性从句中不充当成分，只起连接作用，此处不合适。
which 表示“哪一个”，在主语从句中一般要有特定的范围，此处没有范围不合适。
who 表示“谁”，不符合语境。
2._____ he will come or not is still uncertain.A.IfB.WhetherC.ThatD.When答案解析：B。
“Whether he will come or not”是主语从句，whether 表示“是否”，在主语从句中引导“是否”的情况时只能用whether 不能用if。
that 在名词性从句中不充当成分，只起连接作用，此处不合适。
when 表示“什么时候”，不符合语境。
3._____ surprised us most was his excellent performance.A.WhatB.ThatC.WhichD.Who答案解析：A。
“What surprised us most”是主语从句，what 在从句中作主语，表示“最让我们惊讶的事情”。
that 在名词性从句中不充当成分，只起连接作用，此处不合适。
which 表示“哪一个”，在主语从句中一般要有特定的范围，此处没有范围不合适。
who 表示“谁”，不符合语境。
4._____ is known to all, the earth is round.A.AsB.ThatC.WhichD.What答案解析：A。
“As is known to all”是固定用法，as 引导非限制性定语从句，指代后面整个句子“the earth is round”。
定语从句、名词性从句、状语从句辨析练习
高考真题大演练：1．The notice came around two in the afternoon ________the meeting would be postponed. (2012·江苏，27)A．when B．that C．whether D．how2．It was never clear________the man hadn’t reported the accident sooner.(2011·江苏，26) A．that B．how C．when D．why3． ________ you said at the meeting describes a bright future for the company. (2013·四川，6) A．When B．How C．What D．That4．________makes the book so extraordinary is the creative imagination of the writer. (2013·北京，31)A．That B．What C．Who D．Which5．Experts believe________people can waste less food by shopping only when it is necessary. (2013·北京，33)A．why B．where C．that D．what6．________I want to tell you is the deep love and resp ect I have for my parents.(2013·天津，15) A．That B．Which C．Whether D．What7．Do not let any failures discourage you，for you can never tell____ ____close you may be to victory. (2013·湖南，28)A．how B．that C．which D．where8．Police have found________ appears to be the lost ancient statue. (2013·新课标全国Ⅰ，26) A．which B．where C．how D．what9．The only way to succeed at the highest level is to have total belief ________ you are better than anyone else on the sports field.(2013·浙江，16)A．how B．that C．which D．whether10．It’s good to know________the dogs will be well cared for while we’re away. (2013·山东，30) A．what B．whose C．which D．that11．________ struck me most in the movie was the father’s deep love for his son.(2013·重庆，28) A．That B．It C．What D．Which12．It is by no means clear ________ the president can do to end the strike.(2012·新课标全国，24) A．how B．which C．that D．what13．It doesn’t matter ________ you pay by cash or credit card in this sto re. (2012·山东，25) A．how B．whether C．what D．why14．The limits of a person’s intelligence，generally speaking，are fixed at birth，but________he reaches these limits will depend on his environment. (2012·安徽，27)A．where B．whether C．that D．why15．I made a promise to myself________ this year，my first year in high school，would be different. (2012·浙江，4)A．whether B．what C．that D．how16．It doesn’t matter you turn right or left at the crossing—both roads lead to the park.(2012·天津，9)A．whether B．how C．if D．when17．As many as five courses are provided，and you are free to choose ________ suits you best.(2012·陕西，20)A．whatever B．whichever C．whenever D．wherever18．Jerry did not regret giving the comment but felt ________ he could have expressed it differently. (2012·北京，24)A．why B．how C．that D．whether19．It suddenly occurred to him_______ _he had left his keys in the office. (2012·江西，25) A．whether B．where C．which D．that20．Scientists study ________ human brains work to make computers. (2012·四川，17) A．when B．how C．that D．whether模拟试题来检测：1．________ caused the accident is still a complete mystery.A．What B．That C．How D．Where2．I just wonder ________ that makes him so excited.A．why it does B．what he does C．how it is D．what it is3．Water，which seems so simple and common，is ________ makes life possible.A．what B．that C．which D．how4．I’d like to work with ________ is honest and easy to get on with.A．who B．whoever C．whomever D．no matter who5．When you are reading，make a note of ________ you think is of great importance.A．which B．that C．what D．when6． asked the boy a question_ _______he could go to the concert with him.A．whether B．that C．what D．if7．A warm thought suddenly came to me ____ I might use the pocket money to buy some flowers for my mother’s birthday.A．if B．when C．that D．which8．There is much chance ________ Bill will recover from his injury in time for the race.A．that B．which C．until D．if9．When asked ________ they needed most，the kids said they wanted to feel important and loved.A．what B．why C．whom D．which10．The reason ________ he didn’t come is ________ he was ill.A．why；that B．that；why C．why；because D．why；what11．With his work completed，the businessman stepped back to his seat，feeling pleased ______ he was a man of action.A．which B．that C．what D．whether12．Nobody believed his reason for being absent from the class ________ he had to meet his uncle at the airport.A．why B．that C．where D．because13．The shopkeeper did not want to sell for ________ he thought was not enough.A．where B．how C．what D．which14．He noticed that the straight part of the dance was different in the afternoon from ________ it had been in the morning.A．that B．where C．what D．which15．—Can we get everything ready by the weekend—It all depends on ________ we can get ’s cooperation.A．that B．what C．whether D．if16．________ wants to stay in a hotel has to pay their own way.A．Anyone B．The one C．Whoever D．Who17．The boss refused to sell the car for ________ he thought was not satisfactory.A．that B．which C．how D．what18．It makes little difference to me ________we go or stay.A．whether B．where C．that D．how19．—The two people speak different languages and can not communicate with each other well.—Oh，I see. That’s ________ misunderstanding occurs.A．when B．what C．that D．why20．Before the sales start，I make a list of ________ my kids will need for the coming season.A．why B．what C．how D．which21．—We were surprised to hear that the reason ________ she gave for her absence was ________ her mother was ill.— saw her mother was at the supermarket that morning.A．why；that B．which；that C．that；because D．why；because22．________ the football match will be played depends on the weather.A．If B．Whether C．That D．Where23．—How did you deal with the order—I handed it to ________ I think is in charge of sales.A．who B．when C．whoever D．whomever24．________ is known to us all is that the old worker，for ________ life was hard in the past，still works hard in his seventies.A．As；whom B．What；whose C．It；whose D．What；whom25．Can you tell me________ it was_______ _your cellphone was lostA．where；that B．which；that C．that；where D．where；which【答案及解析】：1答案B解析句意为：会议将被延期的通知大约下午两点发布。
名词性从句与定语从句区别及练习
3. Whoever breaks the law is to be punished. __A_n_y_o_n__e_ _w__h_o__ breaks the law is to be punished. 4. He will give the dictionary to whoever needs if most. He will give the dictionary to _a_n_y_o_n_e_ w__h_o_ needs it most. 5. We’ll remember whomever we turned to for help. We’ll remember _A__n_y_o_n_e_ _(_w_h_o_m__) we turned to for help. 6. They will do whatever he wants them to do. They will do _a_n_y_th_i_n_g_ _th_a_t___he wants them to do. 7. I’ll read whichever book you give me. I’ll read _a_n_y_ of the books _t_h_a_t_ you give me.
9. The days are gone forever when we used foreign oil.
10. As we all know, China is a developing country. 11. This is the village where my father once lived
6、其余问题：
1. 误：I don't know if he comes back this month. 正：I don't know if he will come back this month.
名词性,定语从句对比
一总体分类名词性从句在句子中起名词作用的句子叫名词从句(Noun Clauses）。
名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句以及there be 句型定语从句定语从句是由关系代词和关系副词引导的从句，其作用是作定语修饰主句的某个成分，定语从句分为限定性和非限定性从句两种。
状语从句分为时间状语从句，结果状语从句，让步状语从句，原因状语从句，条件状语从句以及行为方式状语从句。
二．名词性从句，包括主语从句、宾语从句、表语从句和同位语从句（that, whether, if 在从句中不充当句子成分，只起连接作用）1．主语从句在主句中充当主语的从句叫主语从句，它位于主句的谓语动词之前。
但实际使用中常用it 作形式主语，而把主语从句移到主句之后。
例如：Who will go makes no difference.It makes no difference who will go.That she was able to come made us very happy.It made us happy that she was able to come.注意：由what, whoever, whatever, whichever引导的主语从句一般不后置。
2．表语从句位于主句中系动词之后，在主句中充当表语的从句叫表语从句。
例如：One advantage of living in the country is that one can get close to nature.His mother was ill and he had to look after her. That was why he was late.表语从句常见于be动词之后，有时见于look之后；引导表语从句的连接词除前面所列的常用词之外，还可由because, as if/though引出。
定语从句和名词性从句易混点和练习(答案)
定语从句和名词性从句易混点讲解和练习定语从句（Attributive Clauses）定语从句是在复合句中修饰名词或代词的句子，由关系词（关系代词或关系副词）引出。
e.g. She is the girl who talked to me yesterday.名词性从句名词性从句相当于一个名词的功能，根据其在主句的功能作用又可分为主语从句、宾语从句、表语从句和同位语从句。
分类如下：主语从句：What he told me is a secret.宾语从句：I have forgotten what he told me.表语从句：That is what he told me.同位语从句：The news that we won the match was true.引导词总结如下表：用法区别：第一，定语从句有先行词，且先行词可以放入后面的从句中使从句完整；名词性从句中的主语从句、表语从句和宾语从句没有先行词第二，名词性从句和定语从句的最本质的不同点在于，前者在句子中做名词，而后者相当于形容词，修饰或限制名词或代词。
名词性从句由that引导时，通常不充当从句的句子成分，故that可省去。
但定语从句由that引导时，如在从句中充当主语时，则that不能省去。
I know (that) he is to blame.We all know the story that was told by our teacher.第三，使用中最大的区别：定语从句由于在句子中只作定语，故去掉它，整个句子还完整，就像普通的句子去掉一个定语不影响原句的完整性一样。
但名词性从句由于它们充当的是句子的骨干成分（主语，宾语或表语），故去掉它们，原句就不通了。
The boy who has a surprised look is sitting there.Who will come here is unclear.注：用于同位语从句的名词通常有hope, fact, truth, belief, news, idea等抽象名词。