Question

Yesterday,Jane walked away from the discussion.Otherwise,she ___ something she would regret later.

Yesterday, Jane walked away from the discussion. Otherwise, she _____something .....题目的正确解答：
我发现这道题网友解答的都不透彻，根本没能领会到这道题的精要之处，所以，在下献丑，对该题进行分析！！
Yesterday, Jane walked away from the discussion. Otherwise, she ______something she would regret later.
A. had said B. said
C. might say D. might have said
该题目选择D选项，本题出自1996年英语高考真题上海卷第21小题，.might have said,过去本可能说而未说，用的是might have +ed语法结构，译为“（语气委婉）过去本可能做…而实际上未做…”
不选择A的原因是：如果选择A的人，一定是从过去时态的虚拟语气角度考虑，因此要用过去完成时表达，但是，如果是这样的话，应该为：if she had said something, she would have regret later. would 后面一定要有have+regret, 即与过去事实相反的虚拟语气表达法为：从句用“if+主语+had+过去分词”，主句用“主语+would/should/could/might+have+过去分词”，因此A选项错误，故选D。

Answer 1

恩，分析的很对啊，不过还可以这么思考：由于otherwise，所以一定是虚拟语气，因此A、B选项可以排除，而C、D唯一的不同就在于时态，这里用完成时态就比较易于理解。

Answer 2

首先可分析出本句是虚拟语气，排除AB，再根据前句的一般过去式排除C，故选D