短文改错,求讲解He always made good preparations for the lessons,（an

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 18:36:55

短文改错,求讲解
He always made good preparations for the lessons,（and）tried her best to make her classes lively.请问为什么要加and,不加可以吗?在什么情况下需要加and?

一定得加and
因为,一个句子只能有一个动词,除非有连词,则可以再连一个主谓
你这个句子,只是以逗号相连,因此,前面已经有了动词made,后面的tired 这个动词,要么你加and 连词,要么try 要处理成非谓语,trying

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