1.含有be动词的句子,在改一般疑问句时,需要把be动词提前,其他不变,末尾问号.
He is a boy.---- Is he a boy?
2.含有助动词（do,does,did）的句子,在改一般疑问句时,需要把助动词提前,其他不变,末尾问号;注意用到dose或did时,原句中的实意动词要还原.
I play football.---- Do you play football?
He plays football.---- Does he play football?
He played football yesterday.---- Did he play football yesterday?
3.含有情态动词（can,may,must）的句子,在改一般疑问句时,需要把情态动词提前,其他不变,末尾问号.
I can play football.---- Can you play football?
希望可以帮到你!