四、高中语法—【定语从句】讲解

高中语法定语从句详细讲解(一)定义及相关术语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 man who is shaking hands with my father is a policeman.该句中，who is shaking hands with my father是定语从句，修饰先行词the man,"who”是引导定语从句的关系词，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.who指人，在定语从句中作主语。The boys who are playing football are from Class One.正在踢足球的男孩是一班的。Those who want to go to the museum must be at the school gate at 7 tomorrowmorning.想去博物馆的人必须在明晨7点到大门口集合。Yesterday I helped an old man who had lost his way.昨天我帮助了一位迷路的老