一一.定语从句的基本定义定语从句的基本定义放在名词或代词名词或代词后面,由关系代词或关系副词关系代词或关系副词引导的修饰该名词或代词的从句叫定语从句。被修饰的名词或代词叫先行词先行词。一.定语从句的基本定义eg.The boy who is reading is Tom.先行词先行词关系代词关系代词Hospital is a place where a doctor works.先行词先行词关系副词关系副词先行词和关系词的关系先行词和关系词的关系1.A plane is a machine that can fly.2.The boy who broke the window is called Tom.3.The boy whose parents are dead was brought up by his grandfather.4.The school where I study is far from my home.the machine=thatthe boy=whothe boys=whosein the school=where关系代词实际上是先行词的复指关系代词实