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)本回答被提问者采纳