精品文档。- 12 -欢迎下载一、定义及相关术语高中定语从句详细讲解1. 定语从句: 修饰某一名词或代词的从句叫定语从句。定语从句 一般 紧跟在它所修饰的先行词之后。2. 先行词:被定语从句修饰的词叫先行词。3. 关系词:引导定语从句的词叫关系词。关系词有关系代词和关系副词。关系代词有that,which, who, whom, whose, as 等;关系副词有when, where, why, that等。关系词通常有下列三个作用:A、引导定语从句;B、代替先行词; C、在定语从句中担当一个成分。例如:- The manwho is shaking hands with my father is a policeman.在本句中, who is shaking hands with myfather是定语从句,修饰先行词the man, who 是引导定语从句的关系代词,代替先行词the man,在定语从句中作主语。二、关系代词引导的定语从句1.