shall和will;should和would
shall have been
will have been
should have been
would hane been
它们分别要在什么样的情况下用哪个啊?
人气:275 ℃ 时间:2019-11-15 07:07:48
解答
shall have done将来完成进行时,表示在将来某一时间以前已经完成或一直持续的动作.经常与before+将来时间或by+将来时间连用,也可与before或by the time引导的现在时的从句连用.will have done表示从将来的某一时间开...
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