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    4．-I'm sorry．I ________ at you the other day．
    -Forget it．I was a bit out of control myself．（　　）
    A．shouldn't shoutB．couldn't have shouted
    C．mustn't shoutD．ought not to have shouted

    分析 --很抱歉．我那一天本不应该对你大吼．
    --别放在心上．我自己也有点失控了．

    解答 答案是D．本题考查"情态动词+have done"的结构．the other day几天前；对过去的或已经发生是事件的说明用"情态动词+have done"的结构，所以排除A和C；couldn't have done 不可能已经…；ought not to  have done是虚拟语气，表示"本不应做但事实上却做了；根据句意可知，"我那一天本不应该对你大吼"，由此判断答案选择D．

    点评 在掌握虚拟语气的规则的基础上，判断题干属于什么类型的虚拟，然后根据语境，选用恰当的动词形式表达虚拟．

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