一、定语从句的引导词有关系代词who,whom,whose,which,that,as；关系副词when,where,why.定语从句中引导词的选用主要看先行词在定语从句中作什么成分或者是定语从句中缺什么成分.1．定语从句中缺主语,修饰人时用who ...