问题描述：
情态动词用法should would could
john told me that he did a stupid thing yesterday and seemed rather unhappy i can't imagine he _have said that,it was my fault A should B would C could Dmight 答案为C求其他几个选项的解释
should。为什么不是could
john told me that he did a stupid thing yesterday and seemed rather unhappy i can't imagine he _have said that,it was my fault A should B would C could Dmight 答案为C求其他几个选项的解释
should。为什么不是could
问题解答：
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