过去分词作状语 什么时候能省略being?Cooked in wine,snails are a g

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这里之所以加being,是因为on + 名词/doing 可以表示 一...就...,；当.时.比如：
On hearing the news,he .他一听到消息就.
on arriving home,he saw the gift under the christmas tree.一到家他就看到了圣诞树下的礼物
这里是被动,所以就成了 on being told.
上面句子可以翻译成 当被告知那条裙子已经被售货员卖了,那位女士决定第二天早晨再来.
先看下面这个句子.
Being followed by the students,the teacher came into the classroom.这里强调老师进教室的同时学生也跟着.
如果改成being told that the dress was sold by an assistant ,the woman decided to return the following morning.这个句子不对.意思就是被告知的同时她离开了.但是我们都明白应该是先被告知事情,她再离开.不太符合原句想表达的意思.
Told that the dress was sold by an assistant ,the woman decided to return the following morning这个句子是不准确的,应该改成：
Having been Told that the dress was sold by an assistant ,the woman decided to return the following morning.因为told 和 decided to return 两个动作必须分出先后来.是先被告知,才决定离开的.如果要不用on 就得用过去分词的完成形式having done
就先这样解释,有问题我们继续讨论!您的问题问的很好!
======以下答案可供参考======
供参考答案1:
过去分词作状语 ，基本上不用being
况且being不是过去分词，而是现在分次
在 on being told 中，being told 不是状语，而是介词on 宾语。
being told 是动名词的被动结构