请问这里的upon doing是什么意思?
问题描述：
请问这里的upon doing是什么意思?
I was already running, and upon reaching the car across the street...
upon doing 是一个句型么?谢谢
答
upon doing...,也用 on doing...,是“一...就...”的意思.
如：On entering his room,he switched on his computer.
他一进入房间,他就开电脑.