同学你好，该知识点来自沪江网校《英语零基础直达大学六级【3年随心畅学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
都表示这个意思。could强调“会，可能”，would强调“将会”，should强调“应该”
Events could have developed in a dramatically different way.
事情本来可以发展成另一种样子。
In the normal course of events she would have gone with him.
要是事情发展顺利的话，她已同他一块儿走了。
Somebody should have told me.
应该有人告诉我才是。

祝同学学习进步~