have been doing 为什么还有 have been deadj

have been doing 为什么还有 have been deadj have been doing sth have been keeping doing 为什么错了是因为have been后面不能加状态么 have been doing 神马意思? what you have been doing has been doing have been done区别 have been doing ,have done和have doing区别 i has been doing 还是i have been doing --What was Wang Tao doing at that time?--Im sure he must have been playing the piano.为什么这里用must have been playing,不是完成进行时吗?说明现在还在做唠?----------------------------------------------------------------As we now Where have you been?What _____ A.did you do B.have you been doing C.have made D.were you doing这个怎么选,为什么, have been do和have been doing的不同 have been doing,had been doing,will have been down是什么 have been doing 的用法,My borhter has worked in that factory since two years ago 问：不是have been doing吗,为什么会是has worked,余很笨, what have they been doing 是什么时态 have been doing sth是什么时态? have been doing 该怎么用 What have you been doing lately? should have been doing表示什么情况?