医学全在线网站为您整理“2015年职称英语考试卫生类语法”,让你我们一起来学习语法吧。
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?