有如下四种情况：
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?
将这四种情形认真总结,相信你能行!