shall和will;should和wouldshall have beenwill have beenshould have been would hane been它们分别要在什么样的情况下用哪个啊？

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shall和will;should和wouldshall have beenwill have beenshould have been would hane been它们分别要在什么样的情况下用哪个啊？
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shall和will;should和wouldshall have beenwill have beenshould have been would hane been它们分别要在什么样的情况下用哪个啊？
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？

shall和will;should和wouldshall have beenwill have beenshould have been would hane been它们分别要在什么样的情况下用哪个啊？
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始、延续到另一个将来时间的动作或状态,或是发生在某个将来时间,但对其后的另一个将来时间有影响的动作或状态.
should have been 表本应该做而没做的事
would have been 表示过去本来要做某事却因某种原因没做成

would 和should; shall和will 怎么区别运用, Will would; shall should ;can could区别和用法 will和would,shall和should的关系他们的关系仅仅是过去式的关系吗? shall和will的区别 Shall和will的区别 shall和 will 什么不同? shall和should的过去式是什么? should和shall用法有什么区别 shall用法 和should的区别 情态动词(must,may,can,shall,might,could,will,should,need)引导的一般疑问句的肯定和否定回答 will,would,shall,should,can,could,.什么时候加be,什么时候不加..那...it will be done,和 i will be back,,这是动词,,,那为什么加, will和shall的区别举例说明 shall和will有什么区别啊? will和shall的区别是什么 shall和will有什么区别 英语will和shall的区别 shall和will的用法?是什么 will you 和shall we 用法will you 和shall we 放在句末时的用法？