must have done 和 must do 有什么区别!哪一个是表示对过去的猜测呢?有人说must后面接动词原形是表示对现在的推测!那按照这个说法must do是表示对现在的推测!

must be done和 must have done区别 must have done和have done有什么区别 must have been done must have done must have done和must be的区别?权威 must have done 和 should have done 的表示推测区别?must have done 和 should have done 都表示推测时,区别是什么? 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 should have done .would have done. must have done三者之间的意思和用法上有什么区别? could/should/must/.加have done和have been done区别 could have done sth 和must have done sth 的区别是什么 that must have done the must be must have done 区别 must have been done/must be done求解两者异同 must have done 和must have domust have done是对过去的肯定猜测must do 是对现在的肯定猜测吗?一定是 “肯定 ” have done 和gave been done的用法last night it must have been rained为什么错 雨是被下的,所以我觉得应该用have been done. must have been与must have done的区别? Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mus...Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mustn’t do D.shouldn’t have done中B和D有什么区别?Catherine,I have must have done 和must have been 的区别都是对过去的猜测,二者的区别是什么? must have done 的反义疑问句怎么说