Amy sat on the grass beside the river.过去式,Amy sat on the grass beside the river。这个句子的过去式怎么写啊,小弟在此谢过,

问题描述:

Amy sat on the grass beside the river.过去式,
Amy sat on the grass beside the river。这个句子的过去式怎么写啊,小弟在此谢过,