may have been 和may have done的区别,特别是may have been doing和may have done的区别，

Question

他们都表对过去推测啊？？？

好的加分，详细些

Answer 1

是都表示对过去的猜测
may have been 和may have done是一回事，没有重大的语法上的区别。been表示状态，done表示动作而已。
may have been doing和may have done 前面强调进行，过去一直在做

Answer 2

may have been推测过去可能处于某种状态
may have done 推测过去可能干过。。。
may have been doing推测过去可能一直在干。。。
He may have been a teacher as a young man ; he is good at teaching his kids .
He may have lost his job because he can't afford toys for his son now .
He may have been looking for a job because he is out of work now .本回答被提问者采纳

Answer 3

may have been推测过去可能处于某种状态
may have done 推测过去可能干过。。。
may have been doing推测过去可能一直在干。。。