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。