定语从句讲解和练习
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定语从句讲解练习高级版定语从句是英语中一种常用的从句类型,用来修饰名词或代词。
它由一个引导词和一个子句组成,引导词通常有关系代词和关系副词。
一、关系代词1.关系代词引导的定语从句修饰人:- The woman who is standing over there is my teacher.这个站在那边的女人是我的老师。
- The boy whose father works at the hospital is my classmate.那个父亲在医院工作的男孩是我的同学。
2.关系代词引导的定语从句修饰物:- Do you have the book that I lent you last week?你有我上周借给你的那本书吗?- The house which is painted blue is for sale.那个被涂成蓝色的房子正在出售。
3.关系代词引导的定语从句修饰人和物:- The bike that my brother bought is very expensive. 我哥哥买的那辆自行车非常贵。
- Is this the shirt which you want to buy?这是你想买的那件衬衫吗?二、关系副词1.关系副词引导的定语从句修饰地方:- This is the city where I was born.这是我出生的城市。
- Can you show me the street which leads to the park?你能告诉我通往公园的那条街吗?2.关系副词引导的定语从句修饰时间:- He remembers the day when he won the championship.他记得他赢得冠军的那天。
- Do you know the month in which we celebrate Christmas? 你知道我们庆祝圣诞节的那个月份吗?3.关系副词引导的定语从句修饰原因:那就是她没有来参加聚会的原因。
可编辑修改精选全文完整版中考定语从句讲解与练习一、定语从句的概述在复合句中修饰或限定名词、代词的从句叫做定语从句。
被定语从句修饰或限定的名词、代词叫做先行词;引导定语从句的词叫做引导词。
定语从句放在所修饰、限定的词(先行词)之后。
例1:The boy who is reading a story book is my brother. 那个正在读一本故事书的男孩是我的兄弟。
在这句话中,who is reading a story book.是定语从句。
它修饰、限定the boy,the boy是先行词,引导定语从句的who是引导词。
二、定语从句的分类:定语从句可分为限制性定语从句和非限制性定语从句。
1. 限制性定语从句一般紧跟在先行词的后面,用来说明先行词的性质、身份、特征等状况,与先行词的关系非常密切,翻译时一般要译到先行词的前面;如果去掉,则整个句子的意思含混不清。
A doctor is a person who looks after people's health. 医生是照顾人们健康的人。
2. 非限制性定语从句起到补充说明作用,译为汉语时常不译作定语,而是根据句意译为相应的其他形式的从句。
它与主句的关系不如限制性定语从句密切,只是对先行词作附加说明,既使去掉,主句的意思依然清楚。
非限制性定语从句前往往有逗号与主句隔开,如非限制性定语从句放在句子中间,其前后都需要用逗号与隔开。
Yesterday, Jimmy left for Canada, where he had stayed two years.昨天,吉米动身到加拿大去了,他曾在那儿呆了两年。
三、定语从句的引导词引导定语从句的词称为引导词,它一方面连接先行词和定语从句;别一方面又在定语从句中充当句子成份,引导词一般不能按照疑问代词或疑问副词的意义进行翻译,一般情况下应译为“……的”。
定语从句的引导词可为分为关系代词和关系副词。
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。
定语从句定语从句的构成:两个简单句:A man is sta nding there.The man is my brother.= 主从复合句:The man who is standing there is my brother.先行词:行,走路的意思。
先行词就是放在从句前面的词,但是本身为定语从句中的一部分。
所以先行词在从句中作什么成分从句中就用什么样的引导词。
关系词:代替先行词承担从句中的句子成分,放在句首引导从句,所以也叫引导词。
(1.关系代词:在从句里代替先行词充当_______________ 、_________ 、__关系词的种类::I 2.关系副词:在从句里代替先行词充当 _________________关系词的作用:①代替前面的先行词在从句中充当一定的成分② 把两个句子连起来一、关系代词:注意:⑴、当先行词在从句中作宾语的时候可以省略引导词把下列两个简单句合成一个主从复合句1. He wants to see the man. + The man is in Shanghai.① __________________________________________________________________________② __________________________________________________________________________2.1 have a sister. + She works in Hebei.① __________________________________________________________________________② __________________________________________________________________________4.Do you know the girl? + Her mother works here.① __________________________________________________________________________② __________________________________________________________________________5.1 live in a room. + Its door faces south.① __________________________________________________________________________② __________________________________________________________________________⑵先行词做宾语时who与whom的区别一般情况下不进行区分,除非是紧跟在介词之后1. This is the man. The police are looking for him.—This is the man who/whom/that ) the police are looking for.【who/whom/that 可以省略】其中介词for可以提前—This is the man for whom the police are looking.介词在引导词前面只能用whom,而且不能省略,因为介词之后只能接宾格注:that不能放在介词之后2. John is the driver. We talked about him.—Joh n is the driver _________________ we talked about.—Joh n is the driver about __________ w e talked.、关系副词:把下列两个简单句合成一个主从复合句This is the house. + I was born in the house.—对比:This is the house. The house was built 10 years ago.T ______________________________________________________________________________________________________________________________________________________________________________________________ 总结:____________________________________________________________________________ We will never forget the day. + We will hold the Olympic Games on the day.T ______________________________________________________________________________________________________________________________________________________________________________________________ T ______________________________________________________________________________________________________________________________________________________________________________________________ 对比:I will never forget the day . I spent the day with you last year.T ______________________________________________________________________________________________________________________________________________________________________________________________ T ______________________________________________________________________________________________________________________________________________________________________________________________ 总结:____________________________________________________________________________ I don' t know the reason. + He left here for the reason.T ______________________________________________________________________________________________________________________________________________________________________________________________ T ______________________________________________________________________________________________________________________________________________________________________________________________ I don 't know the reason. He has told others the reason.T ______________________________________________________________________________________________________________________________________________________________________________________________ 总结:____________________________________________________________________________ 介词加which 可以等于when、where 或whyThis was a terrible war. + Many people were killed in the war.T① This was a terrible war. + Many people were killed in ___________ .-②_______________________________________________________________________________ -③_______________________________________________________________________________ It is the largest farm in my hometown. A monument stands on the farm.T① It is the largest farm in my hometow n. A monument sta nds on ______ .-②_______________________________________________________________________________ 一③______________________________________________________________________________ The police soon arrived at the sce ne现场).There was a man lying at the sce ne.T① The police soon arrived at the sce ne现场).There was a man lying at ______ .一②______________________________________________________________________________ T③ ________________________________________________________________________________________________________________________________________________________________________________________ 总结:where二介词+which,介词是由_____________________ 所决定的。
初中英语定语从句专项讲解与练习初中英语定语从句系统讲解及配套练(含答案)一.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。
被修饰的名词或代词叫先行词,定语从句一般放在先行词的后面.二、定语从句的关系词关系词常有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。
引导定语从句的关系词有关系代词和关系副词,常见的关系代词包括that,which,who(宾格whom,所有格whose)等;关系副词包括where,when,why等。
关系代词和关系副词放在先行词及定语从句之间起连接作用,同时又作定语从句的重要成分。
三、定语从句的分类根据定语从句与先行词的关系,定语从句可分为限制性定语从句及非限制性定语从句。
1.限制性定语从句紧跟先行词,主句与从句不用逗号分开,从句不可省去,限定性定语从句是先行词在乎义上不成短少的定语,假如去掉的话,主句的意义就不完全,意义就表述不明。
这类句型普通定语从句紧接先行词,如:I was the only person in myoffice who was invited.2.非限定性定语从句主句与从句之间有逗号分隔,起弥补申明感化,如省去,意义仍完全。
非限制性定语从句。
它与主句的关系不十分密切,只是对其附加说明,也就是讲即便去掉定语从句,句意也不受影响,仍然清晰明了。
这样的定语从句要在它和主句之间加一逗号分开。
且关系代词不引导这种非限制性定语从句,如:Michael Jaskon,who is the greatest singer in the world,passed away in 2010.如:Mary lived in the city of Hongkong,where used to be a small poor countryside.4、干系代词的用法1.that既可以用于指人,也可以用于指物。
在从句中作主语或宾语,作主语时不可省略,作宾语可省略。
英语定语从句练习题20篇及解析一、定语从句1.Running man is a very relaxing TV program_______is hot among the young people.A.what【答案】B【解析】【分析】B.XXX【点评】定语从句要注意先行词是人还是物,从而选出合适的关系代词.【详解】试题分析:定语从句中先行词为物,关系代词用that或which.what不引导定语从句,who/whom的先行词是人;根据 a very relaxing TV program可知,先行词是物,故选B.2.—What kind of movies do you prefer?—I prefer the movies _________me something to think about.A.which give【答案】A【剖析】句意:——你喜欢什么类型的电影?——我更喜欢那些让我思考的电影。
此句的先行词是movies,引导定语从句的关联词用that或which,排除C,D;定语从句的主语that或which指代movies,动词不能用三单形式,故答案为A。
B.that XXX gives3.The We Chat is an invention can help people talk to friends, share photos, XXX.A.which【答案】A【剖析】试题分析:句意:微信是可以帮助人们和朋友自由地聊天,分享照片,想法和感觉。
这是一个定语从句,先行词是物invention,关系词可以用which或者that,但是先行词在从句做主语,that不可以省略。
故选A。
考点:考查定语从句的用法。
B.XXX4.This is the dictionary ________ XXX.A.which【答案】A【解析】【详解】B.XXX句意:这是那本母亲给我作为华诞礼品的字典。
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。
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。
定语从句(一)概念:He is the boy who often goes to school late.先行词关系词定语从句关系代词:that,which,who,whom,whose(定语)注:在定语从句中作主语或作宾语。
关系副词:when,where,why,how。
注:在定语从句中作状语。
(二)原则:a. 定语从句必须紧跟在先行词后面,限制修饰先行词。
b. 定语从句必须用关系词来引导。
c. 关系词在定语从句中作一个句子成分。
(三)定语从句可分为两大类,即限制性定语从句和非限制性定语从句。
①限制性定语从句是先行词在意义上不可缺少的定语,如果去掉的话,主句的意思就不完整,意义就表述不明。
这种句型一般定语从句紧接先行词(不用逗号隔开)如:I was the only person in my office who was invited.②非限制性定语从句。
它与主句的关系不十分密切,只是对先行词起补充,说明的作用,也就是说即便去掉定语从句,句意也不受影响。
主从句之间常用逗号分开,且非限制性定语从句不能用that来引导。
This was the American Civil War, which lasted 4 years before the North won in the end.He was taken to another room, where he found a wounded boy, who was dying.(四)引导词:关系代词与关系副词She is the old woman whom I saw this morning.Mary is the girl whose parents work in Japan.Is this the key which you are looking for?October 1, 1949 is the day when New China was founded.This is the house where the great man was born.I don’t know the reason why she looks unhappy today.(1)who 指人,在定语从句中作主语/宾语,不能省略。
His father is the person who will be most unhappy. 他父亲将是感到最不高兴的人。
(2)whom指人,在定语从句中作宾语。
Do you know Mr. Zhang whom they like very much?你认识他们非常喜欢的张先生吗?(3)whose 指人,在定语从句中作定语。
He is the only student in our class whose father is a policeman.他是我们班唯一一个爸爸是警察的学生。
(4)which指物,在定语从句中作主语或宾语。
作主语时,指物可与that 互换;做宾语时可省略。
如果作介词宾语,且介词提前,则不能省略,也不能替换为that。
This is the magazine about which we were talking. =This is the magazine(which/= that)we were talking about.This is the room(which/ that)I painted last week.(作宾语可省略)(5)that指物/人,在定语从句中作主语或宾语。
作主语时,指人可与who替换;指物可与which 替换。
做宾语时可以省略。
The book that(=which)cost me a lot of money is interesting.The hero that(=who)saved me from the fire is a PLA man.The book(that/ which)I bought yesterday is well written.下列定语从句只能用that来引导:1. 先行词为形容词最高级所修饰This is the longest bridge that I have ever seen.2. 先行词为序数词所修饰I happened to be the thousandth guest that visited the great hotel.This is the first composition that he has ever written in English.3. 先行词既包括人又包括物They talked of things and persons that happened in the school.He talked about the teachers and schools that he had visited.4. 主句是who或which开头的特殊疑问句中的定语从句Who is the man that came this morning? Which is the bag that you lost?5. 先行词为the only, the very, the last, the same所修饰He is the very person that the police are looking for.This is the only thing that I can remember.6. 先行词是everything, nothing, something, all, little, much, everybody等不定代词Tell us everything that you know, please.Is there anything that you don’t understand?7. 先行词被all, every, no, some, any, little, much修饰All that glitters is not gold.I’ve read all the books that you gave me.只能用which,不用that 的情况:1. 在非限制性定语从句中。
例如:The meeting was put off, which was exactly what we wanted.2. 定语从句由介词+关系代词引导,先行词是物时。
例如:The thing about which he is talking is of great importance.(五)“介词+ 关系词”及关系副词when, where, why1. The box is full of bottles. He is standing on the box. →The box on which he is standing is full of bottles.The box where he is standing is full of bottles.2. This is the train. We work on the train. →This is the train on which we work.This is the train where we work.3. I know the reason. She did it for the reason. →I know the reason for which she did it.I know the reason why she did it.4. The man is our school master. You shook hands with the man just now. →The man with whom you shook hands is our schoolmaster.5. The pen is made in Shanghai. She is writing with the pen. →The pen with which she is writing is made in Shanghai.不能拆开的词组:look for / look a fter /take care of / put on / take off…(六)关系代词在从句中作主语,谓语动词的数与先行词保持一致。
The student who is good at English studies hard.The students who are good at English study hard.对比:He is one of the students who are good at English.(英语好的不止他一人,他是他们中的一员)He is the one of the students who is good at English.(学生不止一人,他们中只有一人英语好)(七)as 作为关系代词,习惯上用于下列词组:the same....as such ...as as ... as,so…as1. Take as many books as you want.2. Here is so big a stone as no man can lift.3. He read such books as will make him wiser.4. The town is about the same distance from Nanjing as Y angzhou is.As 用于非限制性定语从句,常见以下句型:as you know, as we have seen, as is known to all, as anybody can see, as was expected, as we can imagine, as has been pointed out注意:as与which的用法区别:as与which在非限制性定语从句中,都可指代整个主句,但as引导的从句可放在主句的句首, 句中或句尾,而which引导的从句只可放在主句的句尾As we have seen, oceans cover more than 70 percent of the earth.Oceans cover more than 70 percent of the earth, as we have seen.She was awarded a gold medal, which the whole family considered a great honour.(八)the same…as, the same …that 的区别This is the same bag as I lost yesterday. (相似的事物)I am wearing the same coat that I wore yesterday. (同一事物)(九)定语从句和同位语从句的区别:定语从句相当于形容词作定语,对先行词加以限制或修饰,同位语从句相当于名词,对先行词加以补充或说明,连接词that在定语从句中充当某个成分,而that在同位语从句不充当句子成分。