It was late in the evening when the accident happened at the corner of the street.

题目

It was late in the evening when the accident happened at the corner of the street.
此句的it是形式主语么?还是说此处的it指的是“天”是主句的主语呢?

答案

不是形式主语.正如你所说,“天”才是主句的主语,就像我们常说的It is early.或者It is too late.一样.
It做形式主语时,后面应该是不定式to do sth 或者主语从句that .