Does "on" sometimes mean you and sometimes mean they? How to know the difference?
Ön is you formal singular. Önök is you formal plural. Ő is he/she/it. Ők is they.
Why is this, "Are you not teachers?" and not, "You are not teachers?"?
In an English yes-no question, the verb comes first.
(Exceptions for what I call "surprise/confirmation" questions; I'm not sure of the proper name.)