一个句子跟在一个名词或代词后,对这个名词(代词)进行修饰限定的句子就叫定语从句,被修饰的名词或代词叫先行词,引导定语从句的词叫关系词;
定语从句结构=先行词+关系词+从句
关系代词:who,whom,which,that,在从句中可作主语或宾语
例:The book that I bought yesterday was written by Lu Xun. (我昨天买的那本书是鲁迅写的)
例1: Do you know the girl whose skirt is white?(你知道那个穿白色裙子的女孩吗?)
例2:Did you read the book whose cover is red? (你读过红色封面的那本书吗?)
关系副词:why=for which,where=in/ at/ on which,when=during/ on/ in which,在从句中作状语