表示对过去的推测can have done,may have done 有什么不同?有的书上说有can not have

表示对过去的推测can have done,may have done 有什么不同?有的书上说有can not have 可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗? can/could have done 和may/ might have done 表示对过去发生事情的猜测 哪一组可能 may have done sth 和might be 都是表示对过去的猜测 有什么区别? should have done 可以表示对过去的推测 could only have done表示对过去的推测,只可能...,是否等于must have done? 恳求各位英语大人帮忙详解" May/might have done表示对过去发生的动作进行推测 '这句话 can have done和 could have done有什么区别? could have done 和 can have done 有什么区别?还有would have done must have done 和 must do 有什么区别!哪一个是表示对过去的猜测呢? 对过去事实的虚拟中的:would /could / should /might + have done 有什么区别? 有must/could/can/may/maight have been done吗