定语从句引导词及用法

定语从句中会有引导词，那么定语从句引导词有哪一些呢?以及他们的用法又是什么呢?

　　1. 关系代词有：that,which,who,whom,whose,在定语从句中作主语、宾语中表语，whose作定语。代人的有：who,whom,whose,that;代物的'有：that,which,whose.例如：

The man who helped you is Mr White.(who代人，在定语从句中作主语)

That is the person(whom/who/that) you want to see.(whom,who,that代人，在定语从句中作宾语，可省略)

Im not the fool(that) you thought me to be.(that代人，在定从中作表语)

A dictionary is a useful book which(=that) tells us the meaning of words(which或that代物，在定从中作主语)

　　2. 关系副词有：when(指时间)，where(指地点),why(指原因)，在定语从句中作状语。

例如：Would you suggest a time(when) we can have a talk?(when可省略)

The house where they live is not very large./This is the reason why he did not came to the meeting.

注意：不是表时间的先行词都用when引导定从，不是表地点的先行词都用where引导定从。例如：Well visit the factory which(=that) makes radios.

(which或that在定从中作主语，where不可用主语，故不可用)

They still remember the happy days(which/that) they spent in Beidaihe.

(which或that在定从中作spent的宾语，when不可作宾语，故不可用)