very的意思是很，非常，very一般是陈述事实；so的意思是如此，这么，so更强调情感上。very修饰形容词和副词的原级和作形容词用的现在分词，so是副词，修饰形容词或其它副词。

They are getting the hang of it very quickly.

他们会很快地掌握它的窍门。

It's disgraceful that they have detained him for so long

他们把他扣押了这么长时间，真不光彩。

The problem and the answer are very simple.

这个问题及其答案都很简单。