I went from subway line to subway line only to find that most service had stopped

题目

I went from subway line to subway line only to find that most service had stopped
帮忙分析下句式结构 主要是only to find that不会分析还有就from subway line to subway line 怎么翻译最好能整个翻译一下

答案

翻译：我从一条一条地铁线的去找,却只发现多数地铁都停止了服务.
only to find that 不定式作状语,该不定式动词后又带了一个宾语从句.
from subway line to subway line 从一条一条地铁线