Did you hurt yourself playing basketball?为什么不用play basketball?

问题描述:

Did you hurt yourself playing basketball?为什么不用play basketball?

句子中有谓语动词hurt 了,这里的playing 是作为非谓语动词出现的,在语法上叫做现在分词做伴随状语,意思是打篮球的时候,伤到了自己.