règles de formation à partir d’un adjectif
http://www.polarfle.com/exercice/exoadvinter.htm
http://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-62531.php
http://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-20030.php