as well as连接动词 用法

题目

as well as连接动词 用法
He publishes as well as prints his own books.
She sings as well as playing the piano
请说明两个句子的区别.什么时候用动名词?什么时候用动词原形?

答案

他自已出版并印刷了他的书.
她一边弹钢琴一边唱歌.
自己悟去吧