You had better see a doctor.(改为否定句）You had __ __ see a doctor.说明出来理由.越多越好.要合理.合理+写得好 我会+100分滴

You had better see a doctor.(改为否定句）You had __ __ see a doctor.说明出来理由.越多越好.要合理.合理+写得好 我会+100分滴
You had better see a doctor.(改为否定句）
You had __ __ see a doctor.
说明出来理由.越多越好.要合理.合理+写得好 我会+100分滴

You had better see a doctor.(改为否定句）You had __ __ see a doctor.说明出来理由.越多越好.要合理.合理+写得好 我会+100分滴
better not
had better 相当于情态动词,其否定形式是直接在后面加NOT,即had better not

had better do=had better not do，所以应该填better not

not better