half down a certain block,the policeman suddenly slowed his way.这句话有什么特别之处?

问题描述:

half down a certain block,the policeman suddenly slowed his way.这句话有什么特别之处?
这句有省略吗?

When the policeman walked half down a certain block,he suddenly slowed his way.个人认为完整表达大概是这样吧.谢谢这个我知道 但是我想知道这种用法叫什么?介词短语作状语thx