这是过去进行时的被动语态吗?He was so surprised at being discovered that he did not even try to run away.怎么理解 being discovered ,是过去进行时的被动语态吗?那being前面缺少系动词啊.

分类: 作业答案 • 2021-12-20 02:55:55

问题描述：

这是过去进行时的被动语态吗?
He was so surprised at being discovered that he did not even try to run away.
怎么理解 being discovered ,是过去进行时的被动语态吗?那being前面缺少系动词啊.

答

不是过去进行时的,be之所以用ing形式,是因为前面的介词at,介词后面动词要用ing形式,这是固定的用法.他是被发现的,所以要用be discovered,又因为前面介词是at,所以就成了being discovered ,明白了吧?