1.have done 和 have been doing 是不是一样的.2.had done 和 had been done\doing 有什么区别3.过去式和 be done怎样区分啊这些事词是如何运用的.尽量讲简单一些可以吗?它们是如何运用的，可否举些例子。

may have done和may have done 的区别RTmay have done和might have done have been done 和 to be done done和have done 用法区别RT could have done和need have have done和have been done 的区别, could have done和would have done的区别 should have done和could have done的区别? 区别shouldn't have done 和 needn't have done have done和have been done的用法是什么? 高中英语中might have done 和could have done have done和have been done有什么分别 should have done 和should not have done的区别 should have done 和have done有什么区别 must have done和have done有什么区别 could have done 和 might have done 的区别 have not done 和 not have done 区别在哪? 英语 would have done 和should have done 的用法 should have done和 would have done是什么意思