一、定语从句的关系词
1.关系词在定语从句中的作用:①连接主句和从句;②指代先行词;③在从句中充当一定的句子成分。
2.关系词的分类:①关系代词that, which, who, whom, whose, as等;②关系副词when, where, why等。
3.引导限制性定语从句的关系代词有that, which, who, whom, whose, as等;关系副词有where, when, why等。引导非限制性定语从句的关系代词有which, who, whom, whose, as;关系副词有where, when。