He is the student that studies very well.
The book that I want to buy is too cheap
I am a boy that most people like to get along with.
The trees that you can see is very tall.
I want to ask a question that is very difficult.
that在宾语从句中作主语例句
that 在宾语从句中不做成分，不会做从句主语。
你说的应该是，that 在定语从句中做主语。比如: He is the person that likes reading books.
