bill must have been away from the office._____how many times I phoned him,nobody answeredA.whatever B.no matter C.in spite of D.though

must have been done must have done must have/ must have been的区别 bill must have been away from the office._____how many times I phoned him,nobody answeredA.whatever B.no matter C.in spite of D.though must not have been;could not have Bill must have a screw loose somewhere.什么意思 must have been与must have done的区别? It Must Have Been Love (Cologne) 歌词 请问：有没有must have been? It Must Have Been Love 歌词 must have been done/must be done求解两者异同 must be和must have been有什么区别he must have been sleeping.为什么这里要用must have been而不用must be be,must be,can't have been,must have been吗 must have been doing与must have been done都表示推测,有什么区别呀? must have been请问 must have been 是推测某人一直在做某事吗? i think he must have been a mechanic,中的must和have been是什么词啊? may have been和 must have been been是不是不仅表示被动? 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 can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done