I will never forget the day when we joined the Party.改为简单句是不是 I will never forget the day

题目

I will never forget the day when we joined the Party.改为简单句是不是 I will never forget the day
We joined the Party on the day 第一句forget的后面为什么是the day 不是a day 定语从句改为简单句的第一句不是所有冠词都用不定冠词吗?有没有这样的规定?

答案

因为,we joined the Party 是特定的一天,所以用定冠词the.
改成简单句,就是：I'll never forget the day.
你说的那个规定是不对的,比如：
I'm looking for a book that discusses the Chinese history.
我正在找一本关于中国历史的书.