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?

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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?

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?
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?

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?
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

spent 是spend 的过去式
spend ……(in) doing sth固定搭配。花时间做某事