they are playing football on the field.改一般疑问句做否定回答
问题描述：
they are playing football on the field.改一般疑问句做否定回答
答
改一般疑问句：【 Are they playing football on the field?】
否定回答：【No,they aren't】
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答
Are they playing football on the field?
No,they aren't.
答
答案 are they playing football on the field?no,they aren't