.— John,you _____ go out to play until your homework __________ .—OK,Mum..Amust; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes
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.— John,you _____ go out to play until your homework __________ .—OK,Mum..Amust; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes
.— John,you _____ go out to play until your homework __________ .—OK,Mum.
.Amust; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes
.— John,you _____ go out to play until your homework __________ .—OK,Mum..Amust; finishes B.can’t; is finished C.can’t; has finished D.needn’t; finishes
选 B can’t; is finished
homework,是被做完的,所以一定要用被动语态.这里只有 B 里的 is finished 是被动语态.
C has finished 是现在完成时,不行.
如果要用现在完成时,要说:until your homework has been finished.
排除a,d.选c.
应注意until的用法。
until和现在完成时有关。
until前是否定形式。
C
not until 直到……才……
因为是完成作业,所以用现在完成时态,has/have+动词的过去式
John.直到你完成作业才能去玩
C 约翰,你不能去外面玩直到作业完成