为什么Do Bob and Paul have a basketball?一句中开头用的do?

为什么Do Bob and Paul have a basketball?一句中开头用的do? i have a volleyball.改为一般疑问句 bob and paul have a basketball.改 BOb and Paul have a basketball该给否定句和一般疑问句 Do you have a basketball?(用jaon代替you) Do you have a basketball 是什么意思? Do you have a basketball?回答问题 Do they have a basketball?(he) DO you have a basketball?这里为什么要有DO 做什么成分 【英语】用所给单词的正确形式填空.Do ___（he） have a basketball? Do you think he have a basketball?为什么是have ,而不是has Do Tom and Hank have a baseball bat?为什么这里用DO,不用DOES? ENGLISH的问题文章填空：1.Do you --- sports?do you have a basketball?