He was so excited that he couldn't fall asleep.是什么状语从句?

问题描述:

He was so excited that he couldn't fall asleep.是什么状语从句?
怎么判断其为什么状语从句?
准确答案 谢谢

结果状语从句
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这些从句其实你只要翻译出来就好了
如此...以至于...
你看是不是 因为 所以