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have has had ...是有什么区别?

分类: 作业答案 • 2022-01-09 18:01:39

问题描述：

have has had ...是有什么区别?
我对此类的问题很模糊.

答

have是原型
has是单三
had是过去式

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have has had ...是有什么区别?

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