On being told by an assistant that the dress was sold,the woman returned the following morning dress

题目

On being told by an assistant that the dress was sold,the woman returned the following morning dressed in a fur coat.
句中on being told 怎么用?

答案

on being told by ...that 当被（某人）告知（发生某事）时
全句：当助理告诉她那条裙子已售出时,这位女士第二天一早穿着一件毛皮外套回来了.
用法：on + 动词的 ing 形式,指当...时候,作整个句子的时间状语

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