spend on 后面是用动词ing形式吗
问题描述：
spend on 后面是用动词ing形式吗
A lot of money is spent on research into the causes of cancer.
spend on 后面怎么没用动词ing形式?
谢.
答
人+spend money/time （in ）doing sth 做某事花了多少钱或多少时间
人+spend money on sth 买sth花了多少钱
两种用法,明白了吧!