There was no knowing at what moment he might not put in an appearance, and whenever he did show, it was to storm about something为什么用it而不是he,storm的主语不应该是人吗?
it指的是show这个action,后面的to storm about something解释这么做的目的,这部分相当于it was for storming about something。这里不是说it要发出storm这个动作,所以不受逻辑上是否有主谓的限制。
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