they must have seen the film last week,didn't they?为什么要用didn't they呢?they must have seen the film last week,didn't they?为什么要用didn't they呢?

they must have seen the film last week,didn't they?为什么要用didn't they呢?they must have seen the film last week,didn't they?为什么要用didn't they呢? You mustn't smoke here ,_____ ______?They must have seen the movie yesterday,____ ____? she must have been forty.变反意疑问句!They must have seen the film.反意疑问句The old man must have been a Swedish.否定句My father must have gone to work.反意 初中反义疑问句You must have made a mistake,haven’t you?　　They must have seen the film last week,didn’t they?为什么同样是表推测的完成时,第一个用have,第二个用did They said Prof.Smith would_____a lecture next Wednesday afternoonA.give B.have C.make D.holdThey _____the film at that timeA.may see B.mustn't see C.must have seen D.can have seen什么理由啊！ They ( ) the film at that time.A.may see B.mustn't see C.must have seen D.can have seen 书上答案是c,为什么不用过去完成式?求帮忙分析. you must have seen her yesterday 改为反义疑问句 You must have seen geese before.But did you know why they fly in a Vformation?大神帮我看看这句话有什么错误 what have they seen?they‘ve seen a —,—里该怎么填 what have they seen?they‘ve seen a —— ——该怎么填 They must have finished their homework,_______. ssmust表示肯定推测这层含义时,不能用must not进行反意疑问,而要根据陈诉部分的结构（即must之后的动词）以及含义采用相应的动词形式.如：You must have made a mistake ,have not you?They must have seen the They have seen the film yesterday.(用She做主语) 变形They have seen the film _____(one). 改为间接引语:They said,Iwe have seen the film they have seen this film before.改为被动句 What must they do?They must have a hoilday.标What must they do?They must have a hoilday.标准译文是: When they put they must have When they put the tables inthey must have taken the controls out.