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must have done 和must have do

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must have done 和must have do
must 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 ”
must have done 和must have do
是的,一定是肯定.
must have done 表示 猜测过去一定是做过了什么事情.
例如：
The ground is wet.It must have rained last night.地面很湿,昨晚一定是下过雨了.（肯定性的猜测）
must do 表示 现在一定要做某事
例如：
I must go home now.我现在必须要回家了.（肯定性的表达）
must have done 和must have do must have been done must have done must be done和 must have done区别 关于 must have done. MUST have been done must have done must have done用法 must have done 表示猜测 那 must do 表示什么 must have been done/must be done must have done,must do,can't have done,can't do的区别 must have done和have done有什么区别 must be must have done 区别