They must have played computer games for several hours,didn't they?怎么改?
问题描述:
They must have played computer games for several hours,didn't they?
怎么改?
答
they must have played computer games for several hours,haven't they?他们肯定玩了几小时的电脑,不是么?提问用的是完成时,所以反问也用完成时 如果反问要用一般过去式的话,应该是 they must played computers ,di...