看一本语法书，讲到有关地点状语从句that的用法，我想确认一下，大概的意思是：

时间状语从句，如I will never forget the day when I left for college.此时可以用that替换when,即I will never forget the day that I left for college.

而地点状语从句，如This is the place where he works.不能用that替换where。

而是This is the place which he works in.可以用that替换which,即This is the place that he works in.

是这样吗？时间，地点状语从句的规则不一样，感觉很别扭。