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Tom goes to school,but little Mary( ).She is only three.

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Tom goes to school,but little Mary( ).She is only three.
四个选项:1、isn't 2、won't 3、hasn't 4、doesn't
答案: 4 doesn't
go to school 去上学, 主语是little Mary, 第三人称单数否定应该用助动词: doesn't
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!
再问: 谢谢额!那2、3选项是什么意思?
再答: 2 won't 是一般将来时的否定形式 如: He won't go shopping tomorrow. 3。 hasn't 是现在完成时的否定形式 如: He hasn't finish his homework yet.