Mary often does her homework at nine in the evening .（改为一般疑问句）
问题描述：
Mary often does her homework at nine in the evening .（改为一般疑问句）
答
does Mary often do her homework at nine in the evening ?
望采纳
答
does Mary often do her homework at nine in the evening ?
答
Does Mary do her homework at nine in the evening？
答
Does Mary often do her homework at nine in the evening ?
答
Does Mary often do her homework at nine in the evening
添加助动词三单形式does,提前到句首；原句里的实义动词三单does恢复成原形do