第1个回答 2014-03-09
What class are they having? 意思是他们正在上什么课?What class do they having?因为do是助动词,后面的having应用have
第2个回答 2014-03-09
having 一般与be动词连用;而have一般与do连用;
What class are they having?=What class do they have?本回答被网友采纳
第3个回答 2016-03-27
What class are they having? 意思是他们正在上什么课?