关于虚拟语气
问题描述：
关于虚拟语气
与现在事实相反 主句是should would could might +do 那要是被动语态呢?还有与过去事实相反 主句又变成什么样?
答
SHOULD WOULD COULD MIGHT +BE DONE
过：SHOULD WOULD COULD MIGHT +HAVE DONE
它的被动是SHOULD WOULD COULD MIGHT +HAVE BEEN DONE