问题
选择题
(2013·四川省南充市二模) ________ him not to do so, he wouldn't 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
答案：C
选C 考查倒装、省略和虚拟语气。根据“wouldn't 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。