him not to do so, he wouldn’t have made such a serious mistake.
A. Did I persuade
B. If I persuade
C. If I should persuade
D. Had I persuaded
网友回答
A. Did I persuade
B. If I persuade
C. If I should persuade
(答案→)D. Had I persuaded
解析:句意:如果我说服他不这么做,他就不会犯这么严重的错误了。从主句he wouldn’t have made such a serious mistake.可知这是和过去相反的虚拟语气,条件句应该是:If I had persuaded him not to do so…,这种条件句,可以省略if提前had,所以选D。