问题标题：
whenyouwork___,you___goswimmingwhenyouwork___（bedone）,you___(can't/mustn't/may?)goswimming?一个空是适当形式第二个是选一个..
问题描述：
whenyouwork___,you___goswimming
whenyouwork___（bedone）,you___(can't/mustn't/may?)goswimming?
一个空是适当形式第二个是选一个..
卞丽雅回答：
isdone
may
这句话的意思是,当你的作业完成时,你可以去游泳.
锁业被完成,要用被动语态isdone.
后面半句根据句意应该是肯定句,所以不能用can't/mustn't.
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