Question

Has he a headache?如何否定回答

Has he a headache?如何否定回答，是No, he hasn't 还是No, he doesn't.

Answer 1

这个句子是错误的
行为动词做谓语，一般现在时态变成否一般疑问句时要加入助动词do/Does (一般现在时，主语是第三人称单数加Does )或Did (一般过去时态)，原来的动词要用原形
一般疑问句的回答用yes或no回答什么词开头就用什么词回答。
所以正确的是 Does he have a headache？
否定回答是 No, he doesn't.
又如
He went to the park last weekend.改为一般疑问句是
Did he go to the park last weekend?
Yes, he did.
或
No, he didn't.

另外
如果句子中有be动词，情态动词，助动词时变一般疑问句，直接把这些词提到主语的前面。如
He is a student.改为一般疑问句是 Is he a student？