Judging by his accent,he must be from South.

问题描述:

Judging by his accent,he must be from South.
为什么用judging呢?judging作什么成分?

本来应该用过去分词形式,但这是英语的习惯用法.是非谓语动词的现在分词形式,和by...一起构成状语.
全句翻译;从他的口音判断,他来自南方(是南方人).谢谢,请问一下judge by和judge from都可以互换的吗?可以.