反义疑问句区分We have ever been to Shanghai,haven”t we?You have a headache,don’t you?为什么第二句后面不是haven't you?

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反义疑问句区分We have ever been to Shanghai,haven”t we?You have a headache,don’t you?为什么第二句后面不是haven't you?
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反义疑问句区分We have ever been to Shanghai,haven”t we?You have a headache,don’t you?为什么第二句后面不是haven't you?
反义疑问句区分
We have ever been to Shanghai,haven”t we?
You have a headache,don’t you?
为什么第二句后面不是haven't you?

反义疑问句区分We have ever been to Shanghai,haven”t we?You have a headache,don’t you?为什么第二句后面不是haven't you?
第一句是现在完成时,因为有have +过去分词,因此,助动词是have
第二句的have,不是现在完成时的have,因为后面没有过去分词,只是一般现在时,因此,助动词是do