weredoing是什么時態(tài)

　　He said the protesters were doing a disservice to the nation.

　　他表示，抗議者們的行為正對國家造成危害。

　　He should have been aware of what his junior officers were doing.

　　他本該意識到自己部下在做什么。

　　They were doing just fine.

　　他們做得很好。