举的例子和本题不一样呀，越发没法理解了。
这里的different 是定语，修饰school；根据同等比较原则，from后面应该是一个定语加名词的结构。
你的例子中different 是be动词后的表语，自然后面是与主语同等比较的人了。
如果你是英语老师，这个解释太差了。

【 在 Lcsccc 的大作中提到: 】
: The adjective different means ‘not the same’. When we compare two or more items, it is usually followed by from. We also use different to, especially in speaking:
: Adam is so different from/to his brother.
: This house is very different from/to your last one.
: ...................
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FROM 111.201.189.*