英语中,must have been 和 must have +过去分词,有什么区别如题

英语中,must have been 和 must have +过去分词,有什么区别如题 在英语里coms been、must been和may been和come have been、must have been和may have been的区别?请举例!哪些词是宾语、定语、介词,请举例!coms应该是comes 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 i think he must have been a mechanic,中的must和have been是什么词啊? 英语中have to和must的区别 英语中have been；has been是什么? may have been和 must have been been是不是不仅表示被动? must have been done must have done must have/ must have been的区别 can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done must have been和can't have been和现在完成时有没有联系啊 MUST have been donemust have been doing must have been +名词must have done以上的区别还有是否有must have been done 的用法 和区别EG1 I must have been sleeping 2 your dress must have been expensive.3 I didn't hear the phone,I must have i must have watched 和 i must have been watch TV意思一样吗 为什么 can't have been和must have been每一个的用法 英语have been doing反意疑问句You must have been playing tennis at the time,反意疑问句怎么问?句中有“have been doing，和“at the tiem，不是应该用weren't 英语have to和must的区别 must have been和must be的区别要口诀,简短,易懂. must be的用法和must have been的用法是什么?