英语中状语和定语They stood by the roadside talking about the plan.这句

英语中状语和定语
They stood by the roadside talking about the plan.
这句话中talking是分词,是用来修饰they还是stood
是作状语么
There are people from all over world living here.
这句中的living作定语么
为什么这两句不一样
怎么区别