I was very tired. Otherwise, I ________ to the theatre with you.
答案解析
解析：
答案】：would have gone（对过去时态的虚拟）
解释：I was very tired表示真实情况，otherwise（否则）提示我们后面是虚拟（并没有发生的情景），事实上我没有和“你”去剧院，所以是虚拟语气对过去事实的推测，用过去完成式 would have done something表示对过去的虚拟。完整的表达是If I had not been so tired, I would have gone.
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