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1、限定性定语从句和非限定性定语从句之区别限定性定语从句和非限定性定语从句之区别1. 限定性定语从句是句中不可缺少的组成部分，限定性定语从句是句中不可缺少的组成部分， 主句和从句之间不用逗号分开。除关主句和从句之间不用逗号分开。除关 系代词作宾语时可以省略外，作主语，定语，表语，状语等均不可省略。引导限定性定系代词作宾语时可以省略外，作主语，定语，表语，状语等均不可省略。引导限定性定 语从句的关系代词鹤和关系副词有语从句的关系代词鹤和关系副词有 who whom whose that which when where why as 等。等。 2. 非限定性定语从句是对主句先行词作补充说明，非限定性
2、定语从句是对主句先行词作补充说明， 没有从句不影响主句意思的完整。没有从句不影响主句意思的完整。 一般用逗号把主句和从句分开，引导词有一般用逗号把主句和从句分开，引导词有 who whose whom which when where why as 介词介词+ 关系代词关系代词 (which/whom), 介词介词+whose +名词等引导。名词等引导。 3. As 引导的定语从句引导的定语从句1）As 用作关系代词和关系副词引导定语从句，用作关系代词和关系副词引导定语从句， 构成构成 the same as, suchas 等结等结 构。构。I like the same book as y
3、ou do. ( as 作宾语作宾语)I shall do it in the same way as you did. ( as 作状语作状语)He was late for school today, as often happens to him. (as 作主语作主语)2）As 引导非限定性定语从句引导非限定性定语从句 As 在定语从句中作主语，在定语从句中作主语， 表语或宾语，该定语从句表语或宾语，该定语从句 是说明整个句子的，是说明整个句子的，As 引导的从句可置于句首或主句后。引导的从句可置于句首或主句后。As we know, he studies very hard.As i
4、s known to all, he is the best student in our class.常用的这种类似插入语有常用的这种类似插入语有 as is said above, as is known to all, as it is 等。等。 注意易混点：注意易混点：1.关系代词在从句中作主语时，关系代词在从句中作主语时， 从句的谓语在人称和数上必须和先行词保持从句的谓语在人称和数上必须和先行词保持 一致。一致。2. 关系代词关系代词 whom which that 在限定性定语从句中作动词宾语或介词在限定性定语从句中作动词宾语或介词 宾语，而该介词由位于从句末尾时，关系代词常省略，
5、但宾语，而该介词由位于从句末尾时，关系代词常省略，但 as 一般不省略。一般不省略。3.关系代词关系代词 which 和和 as 在定语从句中的区别是：在定语从句中的区别是： which 不能放在句首，不能放在句首， 而而 as 则可以。则可以。 在句子，在句子，as 有有“正如，正如， 就像就像”之意，之意， 而而 which 则没有此意则没有此意 思。思。练习：练习： 用关系代词和关系副词填空用关系代词和关系副词填空1. His parents wouldnt let him marry anyone _ family was poor.2. She heard a terrible no
6、ise , _ brought her heart into her mouth. 3. The student described in her composition the people and places _ impressedher most.4.What is it _ youre looking for?5.This is the largest laboratory _ we have ever built in our school.6.She is not the only one of the girls _ (sing) well in our class.7.The
7、 old building _ the visitors will visit is a famous artist apartment.8. He went to the book exhibition, _ he saw a large number of new books.9. I have such materials _ are used in their library.10. Do you still remember the day _ we spent doing the experiment?11. A harvester is a machine _ we harves
8、t crops or a person _ is harvesting.12. We visited a few factories, _ had a good market at home and abroad.A. their products B. whose product C. the products of which D. those products 13. The air quality in the city, _ is shown in the report, has improved over the past two months . A. that B. it C.
9、 as D. what14. Recent accidents, _ forty-five people lost their lives, have renewed concerns over the safety of overweight buses.A. that B. which C. where D. when 15.Obviously you dont know how you slept in the night, but the way _ you sleep say something about your health.A. that B. which C. where
10、D. how 16. Ill spend my holiday in Shanghai, _ lives my uncle.A. who B. which C. where D. that 17. It was on a stormy night 16 years ago, _ he will never forget, _ his father dropped the family and left.A. which, that B. that, which C. when, which D. that, where 18. Betweent the two parts of the con
11、cert is an interval, _ the audience can buy an ice-cream. A. when B. where C. that D. which 19. We live in an age _ more information is availale with greater ease than ever before. A. why B. when C. to whom D. on which 20. This tower, _ they are planning to have decorated, is always the best place t
12、o have a view of the sea.A. where B. what C. which D. that 21. So learned a man _ you speak of should have learned this too in his books. A. who B. whom C. as D. that 22. With disability, he has met with this case in his life _ he cant make himself understood.A. where B. that C. which D. why 23. I t
13、hought back a few years to the occasion _ the issue had been raised.A. where B. which C. that D. when 24. When deeply absorbed in work, _ he often was, he would forget all about eating or sleeping. A. that B. which C. where D. when 25. The days are gone _ physical strength was all you needed to make
14、 a living. A. when B. that C. where D. which 26. This is a kind of traditional teaching method _ students are taught a lot about grammar rules.A. where B. which C. what D. when 27. The old town has narrow streets and small houses _ are built close to each other. A. they B. where C. what D. that 28. The anxity
