对话一

A: Do you know the man who is standing there？

B: Yes, he is my teacher who teaches maths.

对话二

A: Where is he from？

B: He is from England, where is far from here.

对话三

A: The man who I met yesterday is a doctor.

B: The book which I borrowed from the library is very interesting.

对话四

A: The girl whose bag was stolen is my friend.

B: The car that I bought last week is very expensive.

对话五

A: The school where I study is very big.

B: The person whom I talked to on the phone is my boss.

这些对话中，定语从句用于修饰名词或代词，提供了更多关于所谈论人物或事物的信息。希望这些例子能帮助你更好地理解和运用定语从句。