Does she have e ping-pong ball?句中的 does
有实在意义吗?它起什么作用?当加了does之后,谓语动词要用什么形式?
再问下...
He does his homework in the evening
Does she have e ping-pong ball?
这两个句子中的 Does 用法一样吗？如果不通，他做什么句子成分，
请把He does his homework in the evening 变成一般疑问句