i must have been dreaming 的语法结构怎么分析呢?

i think he must have been a mechanic,中的must和have been是什么词啊? i must have watched 和 i must have been watch TV意思一样吗 为什么 I must have been dreaming.(改为否定） MUST have been donemust have been doing must have been +名词must have done以上的区别还有是否有must have been done 的用法 和区别EG1 I must have been sleeping 2 your dress must have been expensive.3 I didn't hear the phone,I must have must have been done must have done must have/ must have been的区别 1.I didn’t hear the phone.I ___ asleep.A.must beB.must have been 英语翻译But he__1__ (must be) pleased with the way I drove.为什么填must have been, I've must have been blind.是否病句?I've must have been blind.两个have?该句出自Tonya Mitchell的Stay. It must have been about two in the morning when I returned home .must have been 是什么语法为什么加been must not have been;could not have 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 must have been与must have done的区别? 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 I did not hear the phone,I___asleep.A.must be B.must have been C.should be D.should have been I've must have been blind not to see you look away from meI've must have been blind 这句话有毛病么？ I didn't hear the phone.I _____ asleep.A.must beB.must have beenC.should have beenD.could have been I parked my car right here but now it's gone.It ____ .A must have been stolen B must have stolenC may be stolenD must be stolen