must have的句型是怎么用啊?什么时候是过去时,什么时候是现在完成时啊?

must have的句型是怎么用啊?什么时候是过去时,什么时候是现在完成时啊? to be句型和to have句型怎么用啊! must,can,have to,would like,may 句型转换的区别 都是情态动词啊 must have do 句型,比如when i suggested that some villagers must have come in for free drink这里为什么用must have come啊?不用过去式吗?这是什么句型这句话? 能给我一堆must have 怎么用的句子吗?我不会用啊!i must have asleep ?or i must have been asleep?i must have gone crazy ?对吗?给我一堆例子参考好吗拜托了 英语句型转换,用must 或 have to代替(it will be necessary for to) see a doctor.you must/ will have to see a doctor.这个我就看不懂了,如果用 must,怎么还能后面跟 have to?不是意思重复了吗?求指教!代替括号里的， have在句型里能不能代替must? 英语must +have+动词的过去分词怎么用 have用于什么句型 have a work与have works的区别?the more.........the more的句型怎么用？ must,have to下面是我在一本书上看的：Must 强调主观要求Have to 强调客观需要It’s late.We have to go home.We must work hard.我怎么看怎么觉得这两个例句中的must和have to可以互换用,请大家给点意见, must＋have done 句型must＋have done 表对过去发生事情有把握推测.但是可不可以用must +be 这样的句子来表示?比如说 He must have made it for you.可以变成 He must be made it for you 另外 疑问否定中的can't/could have和there be句型有什么区别.have在什么情况下用,there be句型在什么情况下用.主要是区别 They have more rules than we do.这句话怎么翻译,用了什么句型 有关what引导的从句What we have already achieved gives us hope for whatwe can and must achieve tomorrow.后边这个what we can and must achieve tomorrow句中,what引导了一个什么句型呢?不要回答主语和宾语,因为主语是第一 must和have to的区别我在知道是必须的意思,不过有什么区别啊! 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 完成时用在there be句型中怎么用?是has还是have?