英语语法问题。

I was playing, i was playing alone, I was playing with my brother,
三个句子中，第二个用alone，强调play的方式，所以alone作方式状语。
第三个用with sb,仍然是强调play 的方式，既可以自己play：I was playing .
也可以同他人一起玩：I was playing with my brother .
既然可以认为with sb是方式状语，那么，是不是所有的with sb都是方式状语呢？
比如，I was talking with my brother , I was negotiate with my brother .
这两个句子
是with my brother 作方式状语呢，还是talk with, negotiate with，整体作谓语动词？
亦或是，既可以with my brother 作方式状语，也可以negotiate with, talk with，作谓语动词，my brother 作宾语。