must not have

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/11 02:43:16

must not have

没有must not have done,表示对过去事情肯定的推测用must have done,否定的推测只能用can't/couldn't have done.
在反意疑问句中要根据具体的时态来定,如果句中有具体的过去时间状语的话就用did/didn't we,反之没有具体的过去时间状语,强调对现在影响时,就用完成时.
例如：He must have attended the party last night,didn't he?
He knows everything about it,so he must have read the book,hasn't he?

must not have must not have been;could not have 选用can(not),must(not),should(not),have to,may They must have been to the USA,have not they?与He must have b must和have to的区别 must not和can not的区别 have to,must,do not need,needn't的区别有没有must not have done的说法呀～ we must buy things we ( )A.need not B.do not need C.have not The sick man must not go without ( ) but he must have a ( )w I did not hear the phone,I___asleep.A.must be B.must have be They must have gone there two days ago,did not they?We must can not have visited could have visited must have visited sh