同学你好，该知识点来自沪江网校《新概念英语1、2、3、4册连读【双11专享班】》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~
They would have continued to struggle against economic odds and would have lived in obscurity.
这里would have done表示和一种假设情况，和过去相反的情况，“本来会做某事”
They would never have met if she hadn't gone to Emma's party.
她如果不去参加埃玛的聚会，他们就永远不会相会。

It would never again be possible for them to lead normal lives.
这里would表示过去将来时，因为整个文章说的都是过去的事情，这里would是will的过去式，表示从过去看将要发生的事情，也就是“他们再也无法过正常的生活”

祝同学学习进步~