This is the most beautiful buliding that I have ever visited.此句中为什么用that而不用which?

问题描述:

This is the most beautiful buliding that I have ever visited.此句中为什么用that而不用which?

因为通常出现*和序数词的时候都用that.还有很多种情况必须用that,具体参见以下定语从句的相关语法.