18.2 关系副词引导的定语从句
关系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的含义相当于"介词+which"结构,因此常常和"介词+which"结构交替使用,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?这就是他拒绝我们帮助他的理由吗?
2)that代替关系副词
that可以用于表示时间、地点、方式、理由的名词后取代when,where,why和"介词+which"引导的定语从句,在口语中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.他不大可能找到他四十年前居住过的地方。