作业帮they sang a nice song yesterday改为否定句
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/16 19:13:05
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they sang a nice song yesterday改为否定句
they sang a nice song yesterday改为否定句
they sang a nice song yesterday改为否定句
they didn't sing a nice song yesterday.
they did’t sing a nice song yesterday.