On being是什么用法?On being told that he was hlding up the traffic,……………………这句话开头的On 什么用法?什么时态啊?

问题描述:

On being是什么用法?
On being told that he was hlding up the traffic,……………………
这句话开头的On 什么用法?什么时态啊?

这里的on是prep.在……时候,on并不和后面的Being构成词组
on being told 中文意思:在被告知……的时候