when all the homework____you may go out to play为什么要用is finishing

问题描述:

when all the homework____you may go out to play为什么要用is finishing
好吧、~is finished

你确定是 is finishing不是is finished?谔谔、~打错呃。~是is finished~这是被动语态 因为homework是被完成的一般现在是的被动语态的构成是be+动词的过去分词