原文：Or the person might have had a very frightening experience,like being chased by an angry doy.

题目

原文：Or the person might have had a very frightening experience,like being chased by an angry doy.
这里的have had是什么时态?为什么?
这里为什么要用现在完成时呢？直接用have可不可以？

答案

这是虚拟语气,对过去的虚拟、could /should/might+have done.