A man was sitting in the park watching the ducks on the pond ,when a woman went to him.WHEN用法

问题描述:

A man was sitting in the park watching the ducks on the pond ,when a woman went to him.WHEN用法
在这里,逗号后面的句子是不是我很引导的从句,句子又是怎样翻译的?
(意思表达的不是很清楚,英语不好语文也不好,抱歉\(^o^)/~)
上面句子的我很改成when
打错了sorry

when引导的是 时间状语从局.when = at that time/moment
翻译:一个男人正坐在公园看着池塘里的鸭子.这时,一个女人走向了他.