1.引導(dǎo)限制性定語(yǔ)從句

　�。�1）A shop should keep a stock of those goods which sell best.

　　商店應(yīng)存有最暢銷的貨物。

　�。�2）This is the family which is planning to move to the party.

　　這是要搬進(jìn)城里的一家。

　　2.引導(dǎo)非限制性定語(yǔ)從句

　　（1）用來指代一個(gè)句子

　　Internet is so interesting,which makes all possible happen.

　　因特網(wǎng)如此有趣，它可以使任何事都有可能發(fā)生。

　�。�2）用來指代句子的一部分

　　When deep in thought,which he often was,he would forget all around him.

　　他常常陷入沉思，這時(shí)他就會(huì)忘掉周圍的一切。

　�。�3）如果要引導(dǎo)兩個(gè)非限制性定語(yǔ)從句，第二個(gè)which前要加and

　　He bought a book,which was written by LuXun,and which he decided to give to his friend.

　　他買了本魯迅寫的書，他決定送給朋友。

　　3.名詞+of+which（=of which+名詞=whose+名詞）通常放在先行詞的后面。

　　I’d like a room the window of which looks out over the sea.

　　I’d like a room of which the window looks out over the sea.

　　I’d like a room whose window looks out over the sea.

　　我要一間窗戶面臨大海的房間。

　　4.介詞+which的替代作用

　�。�1）作時(shí)間狀語(yǔ)替代when

　　There used to be a time at which/during which（=when）the Chinese people struggled for freedom.

　　中國(guó)人曾有一段為自由而斗爭(zhēng)的日子。

　　（2）作地點(diǎn)狀語(yǔ)替代where

　　This is the office in which（=where）I used to work.

　　這是我過去工作過的辦公室。

　�。�3）作原因狀語(yǔ)替代why

　　I’d like you to explain the reason for which（=why）you were absent.

　　我想讓你解釋一下缺席的原因。

　�。�4）作方式狀語(yǔ)替代that或省略

　　There are many ways in which（=that/省略）we can solve the problem.

　　解決這個(gè)問題有很多方法。