Rose spent her morning searching for the little girl.
问题描述：
Rose spent her morning searching for the little girl.
1.spent为什么不加s?
2.search可以用原型不加ing吗?
答
spent是spend的过去式,没有人称和数的变化,故不加s
spend one’s time (in) doing something是固定短语（in可加可不加）,故search必须用-ing形式