the hottest place that i have ever been to is Sanya.为什么不用where.

问题描述:

the hottest place that i have ever been to is Sanya.为什么不用where.

这个是同位语从句,不是定语从句,因为后面的句子不缺成分

这是个同位语从句,i have ever been to is Sanya是用来进一步解释或补充说明前面的名词place 的.所以连接词只能用that.