life must have been diffcult when you were a kid oh,not really why do you say____1.that 2.it 3.what 4.one

must have been done must have done must have/ must have been的区别 must not have been;could not have the value of life must have been what you were____ in those years.A.after B.for 选什么 为什么 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 A.must be B.may have been C.can have been D.could be ,为什么呢,Although there is no life on Mars now,some scientists think that there______some form of life a long time ago. where have you been all my life 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? 英语翻译1.It must have been quite a struggle for you become used to academic life in a British school2.Our club is much more than just music life must have been diffcult when you were a kid oh,not really why do you say____1.that 2.it 3.what 4.one