野性的呼唤英文版理解释疑？

这句话你并没有把原句贴完整，请看：for he was a civilized dog, an unduly civilized dog, and of his own experience knew no trap and so could not of himself fear it. 这里的主语当然是he，即故事主人公Buck。原句是很长，谓语动词是并列关系，有好几个：was，knew，could not fear等等。