“介词+关系代词”引导的定语从句请同学们先看下面的高考题：1. Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.A. with whichB. to whichC. of whichD. for which2. Last month, part of Southeast Asia was struck by floods, from ______ effects the people are still suffering.A. thatB. whoseC. thoseD. what3. I saw a woman running toward me in the dark. Before I could recognize who she was, she had run back in the direction ______ she had come.A. of whichB. by whichC. in whichD. from which4. Last week, only two people came to look at the house, ______ wanted to buy it.A. none of themB. both of themC. none of whomD. neither of whom【点拨】●“介词＋关系代词”既可以引导限制性定语从句，也可以引导非限制性定语从句。

在此结构中，关系代词指人时用whom，不可用who或that；指物时用which，不能用that；关系代词是所有格时用whose。

但如果介词后置，则不受这种限制，关系代词还可以省去，尤其在口语中。

如：1) Do you know the girl to whom our teacher was talking?= Do you know the girl (that/who/whom) our teacher was talking to?2) The school (that/which) my brother once studied in is very famous.= The school in which my brother once studied is very famous.2.关系副词when，where，why可用“介词＋which”来代替。

关系副词实际上是介词＋先行词。

其中when=表时间的介词（如：in，at,on,during等）+which； Where=表地点的介词（如：in，at,on,under等）+which； Why=表原因的介词（如：for）+which(1)当先行词表示时间，定语从句中缺少时间状语时，通常用关系副词when引导，此时也可选用表示时间的介词＋which来代替关系副词when。

I still remember the day when I came here. ( on the day =when) (2)当先行词表示地点，定语从句中缺少地点状语时，通常用关系副词where引导，此时也可选用表示地点的介词＋which来代替关系副词where。

This is the house where I lived last year. ( in the house= where) (3)当先行词为reason，定语从句中缺少表示原因状语时，通常用关系副词why引导，此时也可以用for which来代替关系副词why。

There are many reasons why people like traveling. (for the reasons =why) 注意：1. 含有介词的短语动词一般不拆开, 介词仍放在短语动词的后面。

如: look for, look after, take care of， pay attention to, look forward to 等。

This is the watch (which / that) I am looking for.2.“介词+关系代词”前还可有some, any, none, all, both, neither, many, most, each, few等代词或者数词,表示先行词的一部分或全部。

He loves his parents deeply, both of whom are very kind to him. In the basket there are quite many apples, some of which have gone bad.二．介词的选择1.根据从句中动词与先行词的逻辑关系。

Eg:Is that the newspaper for which you often write articles?The school (which/that ) he once studied in is very famous.=The school in which he once studied is very famous.他曾经就读过的学校很出名。

2.根据从句中动词与形容词的搭配。

The student to whom I want to be grateful is Tom.3.根据先行词与介词的搭配习惯，请体会：Eg:1949 was the year in which the P.R.C was founded.4.根据从句的意义来确定介词。

My computer, without which I can’t play computer games, broke down yesterday.昨天我的电脑坏了，没有它我不能玩电脑游戏。

5. whose可转换为“of +关系代词”型。

They live in a house, whose door opens to the south.They lived in a house, of which the door opens to the south.They lived in a house, the door of which open to the south.●listen to, depend on, pay attention to, take care of, look for, look after, look at等固定短语，在定语从句中一般不将介词与动词分开。

如：This is the old lady whom Harold has taken care of.●“介词+关系代词”前有some，any，none，neither，both，all，most，each，few等代词或者数词时，可构成由“名词（代词、数词）+ of + which / whom”来引导的定语从句。

如：There are thirty students in our class in all, most of whom are from villages.现在，我们再来看一看这几道高考题。

第一题中，名词degree常和介词to搭配使用，表示“到……程度”故选B。

第二题中先行词effects 和floods 是所属关系，故选B，从而构成了介词+ whose引导的定语从句。

第三题中动词come常和from连用，表示“从……地方来”，故选D。

第四题是属于“名词（代词、数词）+ of + which / whom”结构来引导的定语从句，故选D。

【高考链接】从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1. Eric received training in computer for one year, _____ he found a job in a big company.A. after thatB. after whichC. after itD. after this2. 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 whichB. by whichC. whichD. that3. We saw several natives advancing towards our party, and one of them came up to us, ______ we gave some bells and glasses. (2006湖南卷)A. to whichB. to whomC. with whomD. with which4. I was given three books on cooking, the first _____ I really enjoyed.A. of thatB. of whichC. thatD. which5. Frank’s dream was to have his own shop _____ to produce the workings of his own hands.A. thatB. in whichC. by whichD. how【小试】一、根据句子意思，在下列句子的第一个空白处填入介词，在第二个空白处填入关系代词whom或which。

1. The person ________ ________ I spoke just now is the headmaster that I told you about.2. The pencil ________ ________ he was writing is mine.3. Hillary, ________ ________ I went to the concert, enjoyed it very much.4. The two things ________ ________ I was not sure were the grammar and some of the idioms of English.5. Her bag, ________ ________ she put all her books, has not been found.6. The stories about the civil war, ________ ________ this is one example, are well written.二、选用适当的关系代词(who, which, whose, that)或关系副词(when, where, why)填空。