Do you like baseball?句中的baseball为什么不用加复数?

Do you like baseball?句中的baseball为什么不用加复数? Do you like baseball?句中的baseball不用加复数,它属于什么词,是名词中的不可数吗? do you like baseball 错在哪 _____playing baseball?---- that sounds good A.do you like B. do you like(paly)baseball 填什么形式? Do you have a baseball and a baseball ( 怎么填 ls that your baseball?变为复数句 Is that your baseball 改为复数句 Do Tom and Hank have a baseball bat?为什么这里用DO,不用DOES? I like playing baseball.(改一般疑问句）是不是,Do you like playing base Do you h___ a baseball 填什么? do you have baseball 的回答?