have been asleep 和have fallenthey （）asleep for an hour?为什么?

have been asleep 和have fallenthey （）asleep for an hour?为什么? have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been的解释have been done；have been doing;have been n(如friends);have been adj(如asleep)辨析,尤其been用法；完成时用法’被动语态用法 1.I didn’t hear the phone.I ___ asleep.A.must beB.must have been i didn't hear the phone.i asleep 为什么不是should have been? have since been 和 have been since have been 和have ever been区别! when he came home,I___for three hours.a.have fallen asleep b.had fallenasleep c.had been asleep d.have slept have been 和 has been的区别 has been和have been区别 It's the frist time that I( )asleep then.A.must be B.must have been C.should be D.should have been为什么 She didn't hear the phone.She ___ asleep.A may be B must be C should have been D must have been 能给我一堆must have 怎么用的句子吗?我不会用啊!i must have asleep ?or i must have been asleep?i must have gone crazy ?对吗?给我一堆例子参考好吗拜托了 He must have been asleep at that time,(wasn't) he?为什么是用 wasn't 而不是 didn't fell asleep 和fall asleep区别 I didn't hear the phone.I _____ asleep.A.must beB.must have beenC.should have beenD.could have been have been和have gone的区别 have been away 和 has/have left have been 和have gone 的区别