Could you contrast the use of quelqu'un with personne please? is that latter used in negative sentences only?

Question

Accepted Answer

Hi Chris,
Technically speaking , ‘personne’ is the opposite of ‘quelqu’un’.
Personne n’est encore arrivé = Nobody has arrived yet
 
Quelqu'un est déjà arrivé = Someone has arrived already 
Hope this helps!

Answer

Hello Cécile,I have a tiny question about your example: "Personne n’est encore arrivé"I see that "personne" is feminine but the verb "arrivé" is not according with the gender of "personne". Is this how it's supposed to be?

Answer

Hi Thy, 
Personne is noone/nobody, not the same word as 'une personne'.
Take a look at the following lesson -
Adjectives after personne, rien, tout le monde, quelqu'un are always masculine in French