had作实意动词动词时,即有实际的意义的时候,
在反义疑问句中我们用did not +主语
如 he had a car,did not he?
如果是助动词had（用于had done完成时态）
我们用两种形式：had not +主语或者had+主语
如 he had been to China,had not he?
he had not been to China,had he?