整句话中文是:Tom was frightened to find that there was only one other guest bisides him himselfTom很害怕除了他以外,只有一个客人.

问题描述:

整句话中文是:Tom was frightened to find that there was only one other guest bisides him himself
Tom很害怕除了他以外,只有一个客人.

TOM惊恐地发现,只有一个客人,就是他自己。

不是吧,应该是说Tom 惊恐地发现包括他在内,只有一个客人.(全部只有他一个人)
besides 是包括某人在内的其他人.