一道单选must have been 和would have been的区别?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 06:51:06

一道单选must have been 和would have been的区别?
Jack described his father, who _______a brave boy many years ago, as a strong–willed man
A. would be B. would have been C. must be D. must have been
我不能理解为什么不能用would表示过去,他父亲过去是一个勇敢地男孩不行吗?
老师说would be可以说是过去的某个事。比如说：I would be a clever boy.之类的。

would have been 表示过去可能会发生而实际没有发生的事,例如：
If it hadn't rained,we would have got there on time.(实际上是天下了雨,我们当时没有按时到.）
must have been 则表示对过去非常肯定的推测,例如：
He must have been happy at that time.(那时他一定很幸福.）

一道单选must have been 和would have been的区别? must have/ must have been的区别 would have been would be 的区别 have been 和 has been的区别 must have been与must have done的区别? must be和must have been有什么区别 have been 和have ever been区别! have been和have gone的区别 have been 和have gone 的区别 will have been doing和have been doing的区别 might have been 和 cound have been的区别 Have been in和have been to的区别?