不是must做情态动词对过去推测用must have done,又是进行时,用must have

不是must做情态动词对过去推测用must have done,又是进行时,用must have 英语中关于推测的用法.比如：must have done是对过去的猜测 要情态动词的过去 未来 现在 的推测常用词组 could only have done表示对过去的推测,只可能...,是否等于must have done? 英语造句用must（表必须和推测两种用法）,must have been（对过去情况推测）,can't(表能力和推测两种 must have done 和 must do 有什么区别!哪一个是表示对过去的猜测呢? must have been done must have done 反义疑问句must 表对现在的推测 意思是一定must表对过去推测怎么用 求【全部】关于以上信息的用法 情态动词can,have to,must用法 He must have been away 哪个是情态动词 是must还是have 关于 must have done. MUST have been done must have done