When he thought he could let the car go without being caught

When he thought he could let the car go without being caught by the police,he did so.
分清主谓宾 he主语 did谓语 so宾语 意思是：他确实是这样做到了.
那么前半句一长串为时间状语when...
在对时间状语进行分析：When he thought he could let the car go without being caught by the police,意思同楼下的：当他想到他可以将车开走并且不被警察抓到时,对于without being caught by the police,without 是介词 介词后面只能是名词 但是be caught 是动词意思:被抓到 变成动名词就是being caught