The user has an aggressive attitude; I think some comments were erased by moderators. Still, the question was interesting (but quite broad; I don't know why it was not closed). I provided an answer: french.stackexchange.com/questions/43303/… Feel free to modify it should you feel necessary.

@Dimitris The question is indeed too broad, I closed it for now because I don't see how one can correctly answer it without writing a whole chapter on it. As for the user, it's not the first time you alert us on them and we are looking into it at the moment in the moderation chat room. Thanks!

@LukeSawczak Cellule is an awesome one!

@Dimitris "je voulais savoir" → l'imparfait est mis pour rappeler que l'auteur en revient à la raison qui l'avait poussé à composer le courriel. Ça me semble correct comme choix, et probablement celui que je privilégierais moi-même. Mais les opinions varient et la préférence de Reyedy (et d'autres encore) pour l'autre version ne me choque pas du tout, tout comme je présume que ma préférence ne leur écorcherait pas non plus les oreilles.