关系副词的意思相当于“介词+which结构”，在定语从句中做状语的成分。在when、where、why关系副词引导的英语定语从句中，只会出现when、where、why或on which、at which、for which等等，关系副词引导的定语从句只能起状语作用，既不能做动词的宾语，也不能做介词的宾语。考高分小编为同学们整理了关系副词引导的定语从句的语法知识点，供大家参考学习。
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、方式或理由的名词，在从句中作状语。
关系副词when, where, why, how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?
I'm surprised the way how (by which) he works out the problem.
注意：
①在非限制性定语从句中，"介词+ which"结构不能代替关系副词。
如：They set up a state for their own , where they would be free to keep Negroes as slaves.
②含有介词短语的动词一般不能拆开，介词仍放在动词后面。
Is this the book which (that) she was looking for?
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