The boy often plays football on sundays .对on sundays 提问
问题描述：
The boy often plays football on sundays .对on sundays 提问
答
对时间提问 是whenwhen does the boy often play football
答
When does the boy often play football?
on Sundays 是一个具体时间概念，对时间提问用'When'。
希望采纳，谢谢！！！！
答
When does the boy often play football?
on Sundays 每逢周日
对时间提问用 when
答
when does the boy often play football?