The woman lives next door The woman is a doctor The woman lives next door The woman who lives next door is a doctor
The machine has been repaired The machine broke down The machine which broke down has been repaired
I came to see the man The man was busy I came to see the man who was busy The man whom I came to see was busy
This is the book Its author is unknown This is the book whose author is unknown
Do you know the girl who danced with me? who I danced with?
Carmen is a doctor Carmen lives next door Carmen who lives next door , ,
SUBJECT OBJECT DEFINING PEOPLE THINGS BOTH WHO WHICH THAT (WHO(M)) (WHICH) (THAT) NON-DEFINING PEOPLE THINGS WHO WHICH WHOM POSSESSION WHOSE