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1、Grammar and usage,Non-restrictive attributive clauses 非限制性定语从句,关系代词：which / who / whom / whose / as 关系副词：when / where (非限制性定语从句中不用关系词that/why；非限制性定语从句中关系词不能省略),非限制性定语从句中通常使用下列关系代词和副词,非限制性定语从句考点归纳：,as 和which引导非限制性定语从句, 代替整个主句。,1. As everyone knows, China is a country with a long history. 众所周知，中国是一个历史
2、悠久的国家。 2. She is a teacher, as is clear from her manner. 她是个教师, 这一点从她的举止可以清楚地看出。,Examples:,3. He missed the show, which was really a great pity. 他错过了演出，这真是很大的遗憾。 4. He invited me to dinner, which made me very happy. 他请我吃饭，这使我很高兴。,Conclusion,1. as 和which在引导非限制性定语从句时, as和which可代替整个主句。这两个关系代词都可指代主句所表达的
3、整个意思,且在定语从句中都可以作主语和宾语。,2. as和which引导非限制性定语从句的不同之处在于： (1) as 引导的定语从句可置于句首,而which引导的定语从句不可放在句首。 (2) as 代表前面的整个主句并在从句中作主语时,从句中的谓语必须是系动词;若从句中的谓语为行为动词，则从句中的关系代词只能用which。另外,as引导非限制性从句,常带有“正如”的意思。,Alice received an invitation from her boss, _ came as a surprise. 2. The weather turned out to be very good, _
4、 was more than we could expect. 3. _ is expected, the England team won the football match.,As,which,which,Practice,4. It rained hard yesterday, _ prevented me from going to the park. 5. _ we can see, the smoke came from the little dustbin.,which,As,II. all / some/ of + whom / which引导非限制性定语从句,Example
5、s:,He has told us many stories, all of which are about the famous Long Match. 2. The students of Class 1, some of whom came from Japan, went camping yesterday.,1. I am doing different types of exercises, all of _ are quite helpful to my health. 2. Many people, some of _ are not overweight, are going
6、 on diets. 3. There are 54 students in my class, three of _ come from US.,Other examples,which,whom,whom,1._ is known to all, China will be an advanced and powerful country in 20 or 30 years. A. Which B. That C. As D. It2. _ I had expected, the number of the audience was well over two thousand. A.As
7、 B. Which C. Whom D. That3. John said hed been working in the office for an hour, _ was true. A. he B. this C. which D. who,C,A,C,4. He invited ten friends to his home, _ are foreigners. A. six of whom B. the six of whom C. six of them D. the six of them5. The factory produces half a million pairs of shoes every year, 80% _ are sold abroad.A. of which B. which of C. of them D. of,A,A,
