关系副词 分类：关系词 定义 引导定语从句，在从句中作状语的词。 形式 when(时间) where(地点) why(原因) 转换 when = 介词 + which, where = 介词 + which 例句 This is the house where I lived. I’ll never forget the day when we met. The reason why he left is unknown. 相关术语 关系代词 定语从句 先行词