. then
　　
　　四､ 关系代词whose可转换为“介词 + which(whom)”
　　“whose + 名词”可与“the + 名词 + of which (whom)”或“of which (whom) + the + 名词”互换｡例如:
　　13. The journey around the worldwould take the sailor nine months,_________the sailing time was 226 days. (2005 辽宁卷)
　　
　　　A. of which 　B. during which
　　　C. from which 　D. for which
　　14. The little child often helps the old woman on Sundays,_________the only child is serving in the army.
　　　A. whose　B. who
　　　C. of whom　D. on which
　　
　　五､ “介词+关系代词”引导的定语从句常可省略为“介词+关系代词+不定式”的形式
　　当“介词+关系代词”引导的定语从句的主语与主句的主语相同时,可以把定语从句省略为不定式,即“介词+关系代词+不定式”的形式｡例如:
　　15. Frank’s dream was to havehis own shop_________to produce the workings of his own hands. (2005 湖南卷)
　　　A. that　B. in which
　　　C. by which 　D. how
　　
　　六､ from which与from where 引导的定语从句的区别
　　介词from后除了接代词或名词作宾语外,还可接介词短语或副词短语作宾语｡当先行词为地点名词时,应该选用from which；当先行词为表示地点的介词短语或副词短语时,应该选用from where｡例如:
　　16. Hisheadsoonappearedout of the window, from_________he saw nothing but the trees.
　　　A. which 　B. that 　C. where　D. it
　　17. Mr Brown lives a dozen blocks awaythe riots(骚乱) began.
　　　A. from which　B. from there
　　　C. from where 　D. in where
　　
　　七､ “介词+关系代词”引导定语从句与关系代词引导定语从句的区别
　　当定语从句中谓语动词与先行词是动宾关系时,若动词为不及物动词,则必须用“介词+关系代词”;反之,则直接用关系代词作宾语｡例如:
　　18. Tom said that he wouldfinish the work in one week,_________I wondered completely.
　　　A. which　B. at which
　　　C. in which 　D. on which
　　19. They stayed with me for three weeks,_________they drunk all the wine I ha　D.
　　　A. which
　　　B. which time
　　　C. during which time
　　　D. during which
　　20. This is an unpleasant subject we might arguefor a long while.
　　　A. which 　B. in which
　　　C. about which　D. with which
　　
　　八､ “介词+which/whom”与“介词+what / who(m)ever”的区别
　　“介词 + which / whom”引导的是定语从句;而“介词 + what / who(m)ever”是名词性从句,其中what相当于“名词 + that (which / who)”,who(m)ever相当于“anyone who(m)”｡要分清两种从句｡例如:
　　21. The way he did it was different_________we were used to. (2005 江西卷)
　　　A. in which　B. in what
　　　C. from what 　D. from which
　　22. A modern city has been set upin_________was a wasteland ten years ago.
　　(2004 天津卷)
　　　A. what　B. which　C. that　D. where
　　
　　Keys: 1. D　2. D　3. B　4. A　5. B　6. D　7. D　8. C　9. C　10. D　11. C　12. A　13. A　14. C　15. B　16. C　17. C　18. B　19. C　20. C　21. C　22. A
　　

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