have been done , have been doing ,have done的区别是什么

have been done 已经被完成
The work has been done. 工作已经完成.（被我们完成,含被动意）
have been doing 完成进行时
He has been playing computer games for 6 hours. 他到现在为止已经连续6小时玩电脑游戏了. （可能还在继续玩下去）
have done 现在完成时
I have done my homework. 我已经完成作业了.（跟第一个一样的时态,只是第一是被动,这个是主动）

have been doing 完成进行时.你可以后面用since