I spent three hours a day talking to him.为什么用talking?

问题描述:

I spent three hours a day talking to him.为什么用talking?

spend on sth 意为在某物上花费多少钱 ,He spent 342 yuan on the old mobile phone .spend time doing sth ,意为花费时间做某事,是固定搭配.就像数学里的公式,定理,一样,不用问为什么.记住即可.