Active Voice: Who designed a car?
Passive Voice: By whom was a car designed?

Active Voice: Why are the duties neglected by an officer?
Passive Voice: Why do officers neglect duties?

Active Voice: Were the dogs chasing him?
Passive Voice: He was being chased by the dogs.

Active Voice: Did the boy not break the glass?
Passive Voice: The glass was not broken by the boy.

Active Voice: Was a rest taken by you?
Passive Voice: Have you taken a rest?

Active Voice: Was a car being driven by him when the accident occurred?
Passive Voice: He was driving a car when the accident occurred.

Active Voice: Did the baby lose her doll?
Passive Voice: Her doll was lost by the baby.

Active Voice: Will someone make all the necessary arrangements?
Passive Voice: Have all the necessary arrangements been made by someone?

Active Voice: Does none like him?
Passive Voice: He is not liked by anyone.

Active Voice: Why is someone neglecting duties?
Passive Voice: Why do officers neglect duties?