of it; about it; from it
En général les amateurs ne s’en sortent pas.
Amateurs generally don't succeed.
— Once Upon a Time... in Hollywood (2019)
Il est trop tard pour s’en soucier.
It's too late to worry about it.
Beaucoup de gens s’en sont plaints.
Many people complained about it.
Tom voulait que Marie s’en fût allée immédiatement.
Tom wanted Mary to leave immediately.
Nobody is going to leave.
Pourquoi est-ce que Tom s’en irait ?
Why would Tom leave?