the day () his father returned from abroad is the happiest day in the boy's life 定语从句填关系词
问题描述：
the day () his father returned from abroad is the happiest day in the boy's life 定语从句填关系词
为什么填when?
我觉得his father returned from abroad是用来修饰the day的,应该用that/which~
答
这个是when引导的时间状语从句.整个句子来说明和修饰THE DAY.他的父亲从国外回来 已经是一个完整的句子了.THE DAY并不是 returned的宾语.你可以吧THE DAY放到RETURNED后面看看.并不通的.所以用WHEN.