4. As an absolute it has no antecedent.

Qui n'obéit pas aux lois n'est pas un bon citoyen,
He who does not obey the laws is not a good citizen.

5. Interrogatively, as an absolute, it may either stand in the nominative or objective.

Qui chante?
Qui voyez-vous?
Who sings?
Whom do you see?

6. Que stands generally in the objective; it is thus invariable, and used for persons or things.

Les visites que j'ai faites,
Les livres que vous m'avez prêtés,
The visits that I have made.
The books which you have lent me.

7. Que, as an interrogative, has no antecedent.

Que desirez-vous?
Que dit-on?
What do you wish?
What do people say?

8. Quoi, what, is invariable and used only of things; it may be used absolutely or relatively.