• Mike has a blue sweater改为否定句
• he has a blue cap改为一般疑问句
• He has white hair. 改为否定句。
• Sue has a blue jacket改为否定句

Mike has a blue sweater改为否定句

Mike doesn't have a blue sweater.

希望可以帮到你！

he has a blue cap改为一般疑问句

Does he have a blue cap?

第三人称使用动词have的has形式，所以助动词在句首应该是do的第三人称does，然后把has变回原形，后面顺序不变。

He has white hair. 改为否定句。

He doesn't have white hair

希望能帮到你，

如有疑问，可继续追问

Sue has a blue jacket改为否定句

答案是：Sue doesn't have a blue jacket  

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