问下英语句子结构

问题描述:

问下英语句子结构
请问这句:we need these mutually agreed-upon social rights and wrongs because without some structure we'd be a bunch of headless chickens running around unable to function as a group.请问running around unable to function as a group这个部分作什么成分,属于什么结构,round unable 连不起来

动名词做后置定语,跟unable to function as a group一样修饰chickens,不知道我的理解对不对,望采纳