一个很难的英语句子结构的分析----高手帮忙

题目

一个很难的英语句子结构的分析----高手帮忙
I happened to be one of people on the way to work that morning.I went from subway line to subway line to find that most service had stopped.Aftermaking my way through Crowds of people,I finally found a subway line that was operating.Unfortunately,there were so many people waiting to board the subway that I could not even get down the stairs to the platform.So I took the train going in the opposite direction,and then switched back to the downtown train.Finally,【after what seemed like forever,the train reached my stop.】 Then I had to walk several blocks in the increasingly heavy rain.When I finally got to my office,I was wet through,exhausted and discouraged.
请分析【】里句子的结构,尤其是after what seemed like forever,最后标准翻译一下.

答案