Tony has to buy a bike,_________?(改为反义疑问句)为什么是doesn’t he不是hasn‘t he

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Tony has to buy a bike,_________?(改为反义疑问句)为什么是doesn’t he不是hasn‘t he
Tony has to buy a bike,_________?(改为反义疑问句)
为什么是doesn’t he不是hasn‘t he

Tony has to buy a bike,_________?(改为反义疑问句)为什么是doesn’t he不是hasn‘t he
做这道题 应先把它改为否定句,应为:Tony doesn.t have to buy a bike .变为反义疑问句将助动词提前即可,也就是doesn't he(Tony)?