may have been怎么用

may have been怎么用 may have been和may be怎么翻译 请问May be 和May have been 的区别,它们分别在什么时候用? have been怎么用,i have You may have been in my heart. have been doing 该怎么用 to have been done 怎么用 will have been done怎么用 may have been和 must have been been是不是不仅表示被动? may have been 和may have done的区别,特别是may have been doing和may have done的区别,他们都表对过去推测啊? That loan may have been one of the best investments that I will ever make.这句话怎么理解?“have been”和“will ever”不矛盾吗? I went our last night,and she may have been reading.为什么用reading can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done may not have been...与 may have not been ...We may not have been proved great adventurers,but have done the greatest march ever made in the past ten years.可以说成We may have not been proved great adventurers ... might be和 may have been的区别?还有是might do和 may have done 有must/could/can/may/maight have been done吗 翻译:Human error may have been a contributing factor Have been Be请问She may be swedish .和 She may have been swedish.的区别.have been什么意义?谢谢.