must have done 表推测时,附加疑问句该怎么样用?

must have done 表推测时,附加疑问句该怎么样用? 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? have to be 和 must be 表推测时的区别 must表推测时的用法?最好有几个例句 MUST当推测时表一定等于HAVE TO吗.不是主观客观的问题.那就是不可替换咯. 关于must表推测时的过去时表达当句子是一般过去时时,是不是要用must + have +动词过去分词? may、can、must、should、can’t表推测时的区别 must can 表推测时,是情态动词还是一般的动词?如题 ought to与推测时与must的区别 must have been done must have done 求：can 表推测时的用法 谢谢can 表推测时的用法. that must have done the 在表推测时must may could might的区别和can not、could not、may not、might not的区别 情态动词表推测时can,could与must,might有何区别? 情态动词表推测时can,could与must,might有何区别? 请问must与might做情态动词表推测时的区别 must be must have done 区别 表推测时,should 和 can有什么区别?