线话语法讲堂：关系副词引导的定语从句

　　关系副词勾引的定语从句主要有以下两种：
 
关联副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。
1）when, where, why
关系副词when, where, why的含意相当于"介词+ which"结构，因此常常跟"介词+ which"构造交替利用，例如：
There are occasions when (on which) one must yield.　任何人都有不得不屈服的时候。
Beijing is the place where (in which) I was born.　北京是我的出生地。
Is this the reason why (for which) he refused our offer?　这就是他拒绝咱们帮助他的理由吗？

2）that代替关系副词
that可能用于表示时光、地点、方式、理由的名词后取代when, where, why跟"介词+ which"引导的定语从句，在书面语中that常被省略，例如：
His father died the year (that / when / in which) he was born.　他父亲在他出生那年逝世了。

He is unlikely to find the place (that / where / in which) he lived forty years ago. 他没有可能找到他四十年前居住过的地方。

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