______ him not to do so,he wouldn't have made such a serioue

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______ him not to do so,he wouldn't have made such a serioue mistake.
A Did I persuade
B If I persuade
C If I should persuade
D Had I persuade

这里考查的虚拟时态的用法,一眼就知道答案选 D.
细看后半句用的是wouldn't have done sth,这说明句子的前半句一定是发生在过去,省略if,had提前.
Had I persuaded him not to do so,he wouldn't have made such a serioue mistake.
=If I had persuaded him not to do so,he wouldn't have made such a serioue mistake.

______ him not to do so,he wouldn't have made such a serioue 【高一英语单选题一道】They ________ him not to do that,but he wouldn't And he does not want to have.Don't want to be nice to him.Do I tried to persuade him not to smoke,but he wouldn't listen I often tell him _(not do) so.But he doesn't listen to me.I -Have you ( )him to give up smoking?_No.I( ),but he wouldn't We thought he wouldn't come to our party in such a heavy rai That wouldn't have been so bad,e_____ that he had a couple o He is not such aperson and he ＿such athing .A:cannot have do I t___ to warn him,but he wouldn't listen. ___my teacher's help,i wouldn't have made such great progres She wouldn't want to live there and () a:so would he b:neith