French verbs are classified into 3 groups; each of them has different endings in the present tense:

Group Infinitive ending Notes
group I er

those verbs are regular and easy to conjugate

ex: manger Audio. Press to listen! (to eat)

group II ir

end with -issons in the first person plural

ex: finir Audio. Press to listen! (to end)

group III ir
indre
oir
ettre

hard to conjugate

ex: partir Audio. Press to listen! (to leave), atteindre Audio. Press to listen! (to reach), pouvoir Audio. Press to listen! (to be able to), mettre (to put)