but i don't think you can smoke here.I didn't know this is a

问题描述:

but i don't think you can smoke here.I didn't know this is a...
为什么是didn't
1个回答 分类:英语 2014-11-05

问题解答:

我来补答
用did not因为回答者所要表述的是他之前不知道不能抽烟这一个事实.表述的是过去的状态所以使用did not,望采纳
 
 
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