theday,thetime等作为先行词时,什么时候用when什么时候用which求例句详解,

Question

the day,the time 等作为先行词时,什么时候用when 什么时候用which 求例句详解,

Answer 1

这个主要看the day,the time在定语从句中是作什么成份.
1.如果这两个先行词在定语从句是充当宾语或主语,则用关系代词which,如：
I will never forget the time which we spent on the farm.
句中的the time由于是充当从句中spent的宾语,因此用关系代词which.
2.如果这两个先行词在定语从句是充当状语,则用关系副词when,如：
I will never forget the day when I became a middl school student.