Vidéos explicatives:
https://www.youtube.com/watch/?v=ByWAxx3Vlts
https://www.youtube.com/watch?v=MUJEvajVtv4
Voici des exercices:
https://www.ortholud.com/orthographe/a_as/index.php
https://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-10971.php
