with your eyes wide open是什么语法结构

你好。是独立主格结构作伴随状态。最好的办法就是用句子来解释：

She stood there shocked with her eyes wide open

== She was shocked and stood there, and her eyes were wide open.

所以，with your / her eyes wide open这个动作状态与句子的谓语动词同时发生。