Possessive Pronoun for On

Question

What is the possessive pronoun for "on"? Is there a fixed one or does it depend on the situation i.e. whether "on" is used as a replacement for vous or nous? Thank you!

Accepted Answer

Hi Chau, 
It depends whether 'on' replaces 'nous' or the universal 'one' or 'people', meaning everyone -
On gagne bien sa vie ici = You are well paid here
On a tous nos démons, nos secrets = We all have our demons, our secrets
On a tous ses démons = Everyone has his/her demons
C'est la personne à qui on doit donner son rapport = She/he is the person who you have to give your report to 
Hope this helps!

Answer

I understand that when on replaces nous, it is correct to say: On a tous nos démons
I understand that when on replaces "one" it is correct to say: On a tous ses démons
I do not understand that when on replaces "tu" it is incorrect to say: Alors, on ne dit pas bonjours a ton papa?
Is this just a matter of usage?

Answer

Hi Ben,
In the case of -
Alors, on ne dit pas bonjour à son papa ?= So, you are not saying hello to your (own) daddy ?
Which is an informal way to say the same thing as :
 
Alors, tu ne dis pas bonjour à ton papa ?
Hope this helps!