精选优质文档-倾情为你奉上一、“介词+关系代词”引导的定语从句基本构成 1.“介词+关系代词”结构引导的定语从句中，关系代词只能用which（指物）或whom(指人) ，即：介词+which/whom。 （1）The man to whom you spoke is a teacher. （2）The city in which she lives is far away. （3）The little girl is reading a book,in which there are many cartoons.注意：当介词放在关系代词的前面时，用在介词后的关系代词不能省略。 2.关系副词when，where，why可用“介词which”来代替。关系副词实际上是介词先行词。其中when=表时间的介词（如：in，at,on,during等）+which；Where=表地点的介词（如：in，at,on,under等）+which；Why=表原因的介词（如：for）+which (1)当先行词表示时
