time tomorrow I would teach you how to play the piano.A. Had I hadB. If I would haveC. If

问题补充：

time tomorrow, I would teach you how to play the piano.

A. Had I had

B. If I would have

C. If I have

D. Were I to have

答案：

A. Had I had

B. If I would have

C. If I have

(答案→)D. Were I to have

解析：对将来情况的虚拟，谓语动词可用should do, were to do或动词的过去式三种形式表示，但意义略有不同。should表示的可能性最大，动词过去式的可能性次之，were to do 的可能性最小。虚拟条件句中有had, should, were时，可以将if去掉，然后把had, should, were提到主语前面。