so是副词吗?如何辨别so后面+形容词\+副词?副词用法?

so是副词吗?
如何辨别so后面+形容词\+副词?副词用法?

so is adv or conj or prep.
adv.Thank you for looking after us so well.
conj.He hit me,so I struck him back
pron.What makes you think so?

so是连词,不是副词