问题描述:
why didn't 可以改成why not
我知道why don't you =why not
但题目是过去式,这样可以替换吗
我知道why don't you =why not
但题目是过去式,这样可以替换吗
问题解答:
我来补答展开全文阅读
问题描述:
问题解答:
我来补答