《老人与海》中有这么一段话：
He is much fish still and I saw that the hook was in the corner of his mouth and he has kept his mouth tight shut.The punishment of the hook is nothing. The punishment of hungry, and that he is against something that he does not understand, is everything.
这里最后一句话中的and that部分，是一个主语从句吗？若是，为何用逗号隔开呢？还有这里主句的谓语动词为何用的是单数is呢？还请各位老师解惑。谢谢。
The punishment of hunger, and that he is against something that he does not understand, is everything.
【翻译】饥饿的折磨，还要应对他不知道的东西，这才是所有中的所有。
1. and 前的逗号，仅表示停顿。不需要也可。
2. that he is against something that he does not understand是个主语从句，跟前面的词组The punishment of hunger 并列。
3. that he does not understand 是定语从句，修饰something。
4. 谓语部分用单数 is，没are，这在语法上允许。这是把主语当作一个整体看待的原故。
