1.Children couldn't have done all this damage.
1.Children couldn't have done all this damage.
couldn't have done?
couldn't have done与couldn't区别
couldn't have done 表示什么
couldn't have done,"不可能已经"?
they couldn't have done better是什么意思
He couldn't have done this怎么改被动语态啊
should have done ,shouldn't have done.could have done,couldn
should have done和shouldn't have done,couldn't have
couldn't have done和mightn't have done有什么区别
情态动词can't have done 和couldn't have done 有什么区别吗
--She couldn't have done that sort of thing.