怎么找先行词

先行词是名词或代词，如果名词或代词后面有修饰它们的句子且它们在句中充当某一成分，它们就是先行词. 把先行词还原到从句中，就能判断做什么成份.如:I will never forget the day when I first went to school.(先行词是day) 从句=I first went to school on the day. (on the day 在从句中作状语=when)