问题补充:
(·四川省南充市二模) him not to do so, he wouldn have made such a serious mistake.
A. If I persuaded
B. Did I persuade
C. Had I persuaded
D. If I should persuade
答案:
A. If I persuaded
B. Did I persuade
(答案→)C. Had I persuaded
D. If I should persuade
解析:选C考查倒装、省略和虚拟语气。根据“wouldn have made”可知,此处表示与过去事实相反的假设,因此从句用if引导且用过去完成时;省略if并将had提前就构成了省略if的虚拟条件句,且构成了倒装结构。