could have done sth 和must have done sth 的区别是什么

题目

could have done sth 和must have done sth 的区别是什么

答案

如：He could have been very rich,but he cared for no money at all.must have done 对过去的动作的推测.如; You must have seen him yesterday.你昨天一定看到他了.微笑——阳光的感言：would have done本来要做...