____ by the look on her face,she didn’t catch what I meant.

问题描述:

____ by the look on her face,she didn’t catch what I meant.
A.Judging B.Judged C.Judge D.To judge
这题不是应该选B吗?表示被动.可为什么答案是A?

judging by 是英语中的独立主格结构,有点像considering ,考虑到.
它的语法意义小于内容意义, 表示从.判断, 一般不用judged形式,不需要从语法上做出判断.