把“He must keep the room warm.（他必须使房间保持温暖。）”改为一般疑问句是：
Does he must keep the room warm？（他必须使房间保持温暖吗？）
英语中将句子改为一般疑问句怎么做？
1.主语+be动词+表语结构
变一般疑问句，把be动词提前，句子就变成 be动词+主语+表语结构?
Mr. White is a very good teacher.-->Is Mr. White a very good teacher?
2.主语+动词+其他
当句子为一般现在时，在句首加do或does，并且把动词变为原形，句子变成 Do/Does+主语+动词原形+其他?
He loves playing football with his friends.-->Does he love playing football with his friends?
句子为一般过去时，在句首加did，句子变成 Did+主语+动词+其他?
Tom's sister graduated from high school last year.-->Did Tom's sister graduate from high school last year?
3.主语+情态动词+动词+其他
将情态动词提前，句子变成 情态动词+主语+动词原形+其他?
I can drive a car.-->Can you drive a car?
4.主语+have/has+动词过去分词+其他
将have/has提前，句子变成have/has+主语+动词过去分词+其他
The students have done their homework.-->Have the students done their homework?