They bought something at the mall.改为一般疑问句 谢谢哥哥姐姐们
问题描述：
They bought something at the mall.
改为一般疑问句 谢谢哥哥姐姐们
答
did they buy sth at the mall?
答
最简单的就是直接在后边加个问号,但是这常见于口语.
书面的还是这样改比较好:Did the buy somethin at the mall?