U must have been sent from heaven to earth to change me.翻译

must have been done must have done must have/ must have been的区别 U must have been sent from heaven to earth to change me.翻译 have u been to China? must not have been;could not have 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 语法题目请分析为什么不选A谢谢“Have u seen David recently?No.I guess he ( )away on vacation.A.must has beenB.must beC.might have been D.may has been 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 How have u been up to She can speak quite fluent English.She ____A.must be in the U.S.A.for some timeB.must have been in the U.S.A.for some timeC.should have been in the U.S.A.for some timeD.may be in the U.S.A.for some time 语法题目请分析为什么不选B谢谢Do u smell smoke?Yes.Something ( ).A.should have burnedB.must have burnedC.should have been burningD.must be burning 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?