somebody; someone
I don't know it. You'd better ask someone from the village/somebody else
They're looking for somebody with a lot of experience in human resource management
You are taking me for someone else
anybody; anyone
Did anybody know the fire-brigade's phone number?
(Is) anybody in?
Did you see anybody in his workroom?
any person; anybody; whoever
Don't open the door to anybody!
Anyone who likes him may trust him
Invite whoever you like
He insulted whomever he met
who
Do you know who it belongs to?; Do you know to whom it belongs?