“介词+关系代词”引导的定语从句是关系代词和关系副词引导定语从句之间的纽带,它多用于正式文体中,用法较为复杂,在教材中未系统出现过,而在近几年高考试卷中频繁出现,故有必要作一总结｡
　　
　　一､ 关系代词的确定
　　“介词+关系代词”类型定语从句中,介词前置时,关系代词不能用that和who,只能用which(先行词为物),whom(先行词为人)和whose(表示“……的”);介词后置时,限制性定语从句中,which可用that,whom也可用who,that替换,且都可省略｡例如:
　　1. I have many friends,_________some are businessmen. (2005 全国卷Ⅲ)
　　　A. of them　B. from which
　　　C. who of 　D. of whom
　　2. The schools themselves admit that not all children willbe sucessful in the jobsthey are being traine　D. (2005 江西卷)
　　 　A. in that　B. for that
　　 　C. in which　D. for which
　　3. Last month, part of SoutheastAsia was struck by floods, from_________effects the people are still suffering. (2005 天津卷)
　　　A. that　B. whose　C. those　D. what
　　4. Albert Einstein, for_________life had once been very hard,was very sucessful later in the science. (2002上海卷)
　　　A. whom　B. whose
　　　C. which　D. his
　　5. —Why does she always ask you for help?
　　—There is no one else_________, is there? (2005 北京卷)
　　　A. who to turn to
　　　B. she can turn to
　　　C. for whom to turn
　　　D. for her to turn
　　
　　二､ 介词的确定
　　若从句的谓语动词为不及物动词或“be+形容词”,介词的确定主要依据不及物动词或形容词的固定搭配;此外主要依据主从句的逻辑联系以及从句中名词与先行词的特点来确定｡例如:
　　6. American womenusually identify their best friend as someone_________they can talk frequently. (2004 上海卷)
　　　A. who　B. as
　　　C. about which 　D. withwhom
　　7. In the dark street there wasn’t a single person_________she could turn for help. (MET 1992)
　　　A. that　B. who
　　　C. from whom　D. to whom
　　8. He was educated at a local grammar school,_________he went on to Cambridge.
　　(2005 山东卷)
　　　A. from which　B. after that
　　　C. after which　D. from this
　　9. Mark was a student at this university from 1992 to 2003,_________he studied very hard and was made chairman of the Students’ Union. (2005 重庆卷)
　　　A. during which
　　　B. for which time
　　　C. during which time
　　　D. by that time
　　
　　三､ 关系副词常可转换为“介词+ which”的形式
　　关系副词why,when,where在句中作状语时,可用“介词+which”替换: why = for+which, when = on / at / in / ... + which,where = at / on / in / ... + which｡例如:
　　10. Many people who had seen the film were afraid to go to the forest when they remembered the scenes_________people were eaten by the tiger. (2005 广东卷)
　　　A. that 　B. by which
　　　C. which　D. in which
　　11. The place_________the bridge is supposed to be built should bethe crossriver traffic is the heaviest. (2005 江苏卷)
　　　A. which； where
　　　B. at which； which
　　　C. at which； where
　　D which； in which
　　12. In a sports team each player has a clear role, and there are few occassions_________members are confused or uncertain of their roles.
　　　A. on which 　B. at which
　　　C. where　D

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