我本来想参加杰克教授的演讲,但是今天上午我洗了半天衣服I would have but I have been washing all this morningI would have 为什么这样用，“我会去”这是典型的虚拟语气用法。是I will have的过去式，所谓的将来过去完成时，还是叫过去将来完成时，记不清了（意思是按照本来意愿，我已经去了（但实际没去））。