介词 + 关系代词”的用法
   
【典型考例】1. By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ____ appeared a rare rainbow soon.. (2008福建)
  A. of which    B. on which      C. from which  D. above which
2. For many cities in the world, there is no room to spread out further, ____ New York is an example. (2008四川)
    A. for which        B. in which        C. of which        D. from which
【解析】不难看出,这两道题都是考查了“介词+关系代词”引导定语从句。第1题题意:一道罕见的彩虹出现在Mount Qomolangma的上方。appeared a rare rainbow为倒装形式。故选D。第2题先行词为many cities,从句还原后成为 “New York is an example of many cities”,所以选择介词of,表示所属关系
“介词+关系代词”引导的定语从句是同学们学习定语从句中的难点之一,也是各种考试的重点之一,尤其在近几年的高考题中出现的频率高,而且变化多样经过对定语从句的学习,同学们对于定语从句中关系代词、关系副词的选择可能不会感到什么困难,但对于介词+关系代词”引导的定语从句的用法往往感到棘手。希望下面的总结能助同学们一臂之力
“介词+ 关系代词”引导定语从句基本构成:
“介词+ 关系代词”引导定语从句时,介词的宾语只能用which(物)和whom(人),即:介词+which/ whom。
1. 当介词放在关系代词的前面时,介词的宾语只能用which或whom,关系代词不能省略。
  This is the hero of whom we are proud.
2. 当介词位于定语从句的末尾时,可用that/which(物)that/whom/who(人)作介词的宾语,而且作介词宾语的关系代词往往省略。
  This is the hero that/ who/ whom we are proud of. 可省略
3. “复合介词短语+关系代词which”引导的定语从句,常与先行词用逗号分开,定语从句常用倒装结构。 
He lived in a big house, in front of which stood a big tall tree.
“介词+ 关系代词”中的介词的确定方法
(一)根据定语从句中的谓语动词确定介词,其动词介词搭配,构成动词短语。
【典例】1. I saw a woman running to ward me in the dark. Before I could recognize who she was,she had run back in the direction ______ she had come.   (2006重庆)
A. of which    B. by which      C. in which      D. from which
2. -----Why does she always ask you for help? (2005北京)
  ---- There is no one else ______, is there?
  A. who to turn to  B. she can turn to  C. for whom to turn    D. for her to turn
3. American women usually identify their best friend as someone _____ they can talk frequently. (2004上海)    A. who          B. as            C. about which      D. with whom 
(二)根据定语从句中的形容词确定介词,其形容词与介词搭配,构成形容词短语。例如:
The two things about which Karl Marx was not sure were the grammar and some of the idioms. (be sure about)
The teacher of whom the students in our class are fond is Mr. Wang, our English teacher. (be fond of)
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(三)根据定语从句所修饰的先行词确定介词,其先行词往往是表示时间、地点、原因、方法、工具等的词,它们与介词之间有一定的联系。当“介词+关系代词”在定语从句中充当时间、地点、原因状语时,可分别用when, where, why 替换。
【典例】4. We went through a period______ communications were very difficult in the rural areas. (2008上海)
A. what          B. whose      C. in which     D. with which
5. He was educated at the local high school, ____ he went on to Beijing University. (2007江苏)
  A. after which    B. after that    C. in which    D. in that
6. 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. in which   B. by which    C. which      D. that
7. The English play ____ students acted at the New Year’s party was a great success. (2004全国I)
A. for which    B. at which    C. in which      D. on which
(四)根据句子的意思确定介词。有些句子,先行词完全一样,定语从句中谓语动词不是由固定的动词短语构成的,这时,要根据句子所要表达的意思,选用不同的介词。
【典例】8. She was educated at Beijing University , ______ she went on to have her advanced study abroad. (2006陕西) 
A. after that      B. from that    C. from which    D. after which
9. He was educated at a local grammar school, ______ he went on to Cambridge. (2005山东)
A. from which      B. after that          C. after which      D. from this
10. The schools themselves admit that not all children will be successful in the jobs ____ they are being trained. (2005江西)
  A. in that        B. for that      C. in which        D. for which 
“介词+ 关系代词”引导定语从句扩展形式
(一)“不定代词+介词+关系代词”结构
用于这个结构中的代词主要是 both,all,much,many,(a)few,(a)little,none,some,several,most等不定代词,而其后的介词多用of。这种结构常用来引导非限制性定语从句,有时候也可把“of+关系代词which/whom”置于代词前。
【典例】11. The growing speed of a plant is influenced by a number of factors, _____ are beyond our control. (2008湖南)
A. most of them  B. most of which C. most of what   D. most of that 
12. Last week,only two people came to look at the house,    wanted to buy it. (2007安徽)
A.none of them  B.both of them  C.none of whom  D.neither of whom
13. It is reported that two schools,____ are being built in my hometown,will open next year. (2007四川)
  A.they both      B.which both    C.both of them    D.both of which
14. I was told that there were about 50 foreign students _____ Chinese in the school, most _____ were from Germany. (2006辽宁)