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He kept his head otherwise the accident would have happen

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/17 09:30:57
He kept his head otherwise the accident would have happen
为什么用would have happen 而不用过去时happened或用would happen呢
不好意思 happen 应改为happened
是would have happened.
情态动词过去时 + 完成时表示对过去事情的推测.这里也是一样..表示推测"要不是他kept his head,就会发生一场事故"...例如:
I would have done my homework if I wasn't ill.如果不是我病了,我已经做完作业了...
类似的还有:
must have done/ could have done/should have done等等...详细信息请参见语法书上对表推测情况的说明..