didn't 是用在过去式的 例如,i didn't read book yesterday 我昨天没有读书
doesn't 前面用第三人称单数 she doesn't read book now 现在她没有读书
don't 前面是第一二人称单数 i或者 you
didn't 是用在过去式的 例如,i didn't read book yesterday 我昨天没有读书
doesn't 前面用第三人称单数 she doesn't read book now 现在她没有读书
don't 前面是第一二人称单数 i或者 you