have been doing 往往怎么用?叫：完成进行时吗?

have been doing 往往怎么用?叫：完成进行时吗? have been doing 该怎么用 have been doing sth What have you been doing 怎么用recent添 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 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 doing 为什么还有 have been deadj have been do和have been doing的不同 would have been doing这个时态怎么用?would have been doing是个什么时态?这个时态怎么用?请大家最好举几个例子, have been doing,had been doing,will have been down是什么 what have they been doing 是什么时态 have been doing sth是什么时态? What have you been doing lately? should have been doing表示什么情况?