卫生类职称英语备考语法知识：关系副词引导的定语从句

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。

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.

Beijing is the place where(in which)I was born.

Is this the reason why(for which)he refused our offer？