They usually play football on the playground对划线部分usually提问
问题描述：
They usually play football on the playground对划线部分usually提问
答
They usually play football on the playground.(对划线部分usually提问)
How often do they play football on the playground?
望采纳，谢谢！！
答
How often do they play football on the playground?
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答
How often do they play football on the playground?对频率提问用how often