否定句,怎么确定用don't还是does't,怎么确定三单My father是三单吗后面用doesn't吗

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/10/02 17:49:23

主语是第三人称单数即单三时,后面的谓语动词变成否定时,用doesn't,除此之外都用don't.
怎么确定主语是不是单三,很简单,我是第一人称,你是第二人称,除了你我之外的都是第三人称,其中的单数形式就是单三,也就是除了I,you 之外的单数人称,如he,she,my father等.
my father 是单三,后面当然用doesn't了.
再问： My father ? have ping pong balls。求问号
再答： My father doesn't have ping pong balls. 我爸爸没有乒乓球。

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