We have four classes in the morning.four划线变成how many classes do y_英语解答

We have four classes in the morning.four划线变成how many classes do you have in the morning.中DO是为什么

人气：462 ℃　时间：2019-08-21 02:52:43

解答

How many classes do you have in the morning?
do是助动词,疑问句要用助动词+动词原形