He is the man.He gave you lots of books last month.改定语从句

He is the man.He gave you lots of books last month.
----He is the man who或that gave you lots of books last month.
This is the man.You introduced him to us yesterday.
----This is the man who(m)或that you introduced to us yesterday.
This is the shop.We used to work there.
----This is the shop where we used to work .
He is a doctor.You are looking for him.
----He is a doctor who（m）或that you are looking for .
This is the day.I'll always remember it.
---This is the day that或which I'll always remember .

He is the man who gave you lots of books last month.
This s the man who(m) you introduced to us yesterday.
This is the shop where(at which) we used to work.
He is a doctor for whom you are looking.
This is the day (that) I will always remember. 被修饰的部分做主句宾语的时候that可省略。