They played football in the playground yesterday.改爲否定句,對play

題目：

They played football in the playground yesterday.改爲否定句,對played football提問,
改爲一般疑問句,對played football部分提問,改爲一般疑問句,肯定回答,否定回答

解答：

一般疑問句：Did they play football in the playground yesterday?
肯定回答 Yes ,they did.
否定回答 No,they didn't.
對played football部分提問：What did they do in the playground yesterday?