I don't know where I am mistaken. (宾语从句)

You are saying that everyone should be equal, and this is where I disagree. (表语从句)

The question where he has gone puzzles us. (同位语从句)

2) 引导定语从句

where本身在从句中作地点状语，前面可以用表"地点"的名词作先行词，也可以用有地点含义的抽象名词作先行词。如：

I work in a business where almost everyone is waiting for a great chance.

There are cases where the word "mighty" is used as an adverb.

One of the most important rules of joyful living is that judging others takes a great deal of energy and pulls you away from where you want to be.

3) 引导地点状语从句

where引导地点状语从句时，一般修饰句中的动词或动词短语，说明动作发生的地点。其意思相当于at the place where。如：

After the war, a new school building was put up where there had once been a theatre.

You should make it a rule to leave things where you can find them again.

注意：有时，当where引导地点状语从句具有抽象意义表示条件时