请问didn't did don't not或者还有什么的,是怎么个用法比如why didn't you say goodbye 和why don't you say good bye一样吗?都可以这么用吗?谢谢!
问题描述：
请问didn't did don't not或者还有什么的,是怎么个用法
比如why didn't you say goodbye 和why don't you say good bye一样吗?都可以这么用吗?
谢谢!
答
是一样的，意思都是你为什么不说再见？
答
didn't是don't的过去式
don't=do+not
do是助动词,它还有一个意思是做和干的意思
did是do的过去式
not是不的意思
你写的句子时态不一样,第一句是一般过去时,第二句是一般现在时