I am sitting by the river and watching the boys ( )

问题描述:

I am sitting by the river and watching the boys ( )
括号中填swim还是swimming.为什么?

swimming
既然是坐在那观望,肯定那些孩子们正在那游
watch sb doing sth 看着某人在做某事这里的watch成watching了,跟watch sb doing sth 这个句式还成立吗还是这个句式, 没问题