It's too strange that they should have left without saying goodbye to us.

问题描述:

It's too strange that they should have left without saying goodbye to us.
这句是强调句吗 还是that为主语从句
这里should是什么意思?

that引导主语从句这我觉得没错,但是后面的should have+过去完成,而且是否定形式,应该翻译成不该发生某事却发生了,是情态动词的用法.