must have done,must do,can't have done,can't do的区别

must have done,must do,can't have done,can't do的区别 must have done 和must have do 用must have been/done或can*t have been/done 改写句子 用（can't ） （ have been/done ） （must have been /done） 改写句子 用can't have been/done must have been /done 改写句子 Needn't have done 和needn't do的区别! can't have done与could't have done的区别 could't have done和can't have done的区别 mustn't have done和can't have done的区别 can have done和could have done有无区别?can't have done和couldn't h musn't have done can't have done 用括号里的正确形式填空和句型转换(用must have been/done 或can't have been/done改