定语从句that who whom的区别和例句总结如下：
定语从句that who whom都可指代人，但用法有所区别。
The woman who/that won the contest also won last year.
The manager who/that employed me was called Steven.
I can describe the person that/who/whom I saw.
=I can describe the person I saw.
The boy to whom you spoke is my friend.
God helps those who help themselves.
Success belongs to those who are willing to work hard.
D．先行词有the very/the only/the same等修饰时，常用that
You are the only student that wants to be a singer.
This is the same man that I saw the other day.
Mary is no longer the girl that she was.
=Mary is no longer the girl she was.
Washington's early life shaped him into the great man that he later became.
=Washington's early life shaped him into the great man he later became.
She talked about the earth and men that Aristotle once talked about.
Who is the girl that is standing there?
Who is the woman that has black hair?
She was the most beautiful girl that I ever saw.
It was the best decision that I ever made.
You are the first girl that I know.
I．强调句中，较常用that： It is….that….
It was John that you saw. 你看到的是约翰。
It was Steve Jobs that/who created the new product.
A．在从句中作主语时，用who ， that不用于非限制性定语从句中
Einstein, who was born in Germany, is famous for his theory of relativity.
Steven, who stole the wallet, is at large.
She was introduced to the author, who/whom she was excited to meet.
This woman, with whom he had lived for two years, had never known him.
以上就是定语从句中关系词that who whom的区别，希望对你有所帮助。你可能还需要查看：定语从句that which的区别