May not have done 是表示可能不还是不可能 那Could not have done呢

May not have done 是表示可能不还是不可能 那Could not have done呢 请问是have not only done ...but also done ...还是 have not only done ...but also have done ... may have done和may have done 的区别RTmay have done和might have done 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? could not 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 表示对过去的推测can have done,may have done 有什么不同?有的书上说有can not have done 没有can have done迷糊了◑▂◐ have not done 和 not have done 区别在哪? would rather have done否定式怎样的?答案是would rather not have done,为什么不是would rather have not done.这里的have done又不是to have done,不是非谓语动词. 虚拟语气中对过去的虚拟主句否定是用would have not done or would not have done? 翻译：We may not have proved great adventurers, but we have done the greatest march ever made in...翻译：We may not have proved great adventurers, but we have done the greatest march ever made in the past ten years.顺便介绍may not have done may do和may have done的区别 应该是not have done 还是 hane not done should have done 和should not have done的区别 英译汉we may have proved great adventurers,we may have proved great adventurers,but we have done te greatest march ever made in the past ten years.应该是we may not have proved …… may have done might have done区别He___you more help.even though he was very busy 为什么不能用may have done呢?may have done 不也能表示过去的推测吗?...关键是他说要用might have done我想问下。 1should not have done 2 could not have done 3 would not have done 有什么区别