Tom ate more food than(the amount of food which) was good for his health.

问题描述:

Tom ate more food than(the amount of food which) was good for his health.
括号中的主语为什么可以省略

这算是一个”此时无声胜有声“的英语习惯吧. 有些东西不需要说出来,大家都知道是什么意思.
more than was good 是一个用法.表示过量做某事了.
希望可以帮到你~