Most verbs with IR endings are also regular. Here are a few of the most important ones:
Choisir (to chose), Agir (to act), Applaudir (to applaud), Avertir (to warn), Grandir (to grow up), Obéir (to obey), Finir (to finish), Guérir (to heal), Investir (to invest), Nourrir (to feed), Ralentir (to slow down), Réfléchir (to think about something), Remplir (to fill), Réussir (to succeed), Vieillir (to grow old)
To conjugate these verbs you must replace IR with the correct ending.

Here is the pronunciation of these endings:
Now let’s conjugate one of the verbs
Finir, (to finish)
Je finis, (I finish)
Tu finis, (you finish)
Il/Elle/On finit (he/she/we finish(es))
Nous finissons, (we finish)
Vous finissez, (you finish, plural or formal)
Ils/Elles finissent, (they finish)
Let’s conjugate another verb. It has the exact same endings but is more difficult to pronounce. Listen closely!
Choisir
Je choisis, (I choose)
Tu choisis, (you choose)
Il/Elle/On choisit, (he/she/we choose(s))
Nous choisissons, (we choose)
Vous choisissez, (you choose, plural or formal)
Ils/Elles choisissent, (they choose)
Exercices