they do homework at seven o'clock every day怎么变一般疑问句?

问题描述:

they do homework at seven o'clock every day怎么变一般疑问句?

Do they do homework at sever o'clock every day?

Do they do homework at seven o'clock every day?

原句中的do是实义动词,不是助动词,所以要在句首加助动词do帮助表示疑问:
Do they do homework at seven o'clock every day?

Do they do homework at seven o'clock every day?