1.They have been married for three years.是完成时的被动语态吗?如果不是,要怎么分辨?还有这句 2.I have been asleep for 2 hours.3.He has been away from Beijing for three years.非延续性动词常用有哪些?非延续性动词转

Where have they been? 英语翻译The Greatest Threat FisheriesLarry B.Crowder and Elliott A.NorseEvidence has been accumulating for well over a century to show that fisheries have a large impact on target fish populations.But they have also had devastating effects on mar They have a____ been there 单项选择!He as well as his wife and children ____ to England twice.A.has gone B.has been C.have gone D.have beenI have already known their marriage,so i am ____ surprised at the news that they are mar what have they been doing 是什么时态 What places have they been?怎么翻译? where have they been?是现在完成时吗? they have been in kate's for they have been the subject of debate they have been acting up more lately they have been there before.so have i they have been there before.(),() 改为同义句 They have been here once.把been换成came怎么样 they said they have been married for ten years They have never been opened.为什么不可以是They never have been opened. they have been here since 1988,对1988进行提问,（）（）have they been here? They have been friends for 6 years. 改为同义句 They have been friends _______ _______. They have been skating for five hours 同义句 They have been skating_______ _____ ________ ______ Where have they been?能不能说：They have been in their room.