The verb form that ends in -IR is called the infinitive (in English, the infinitive is the verb preceded by the word "to"), and -IR is the infinitive ending. The verb with the infinitive ending removed is called the stem or radical. To conjugate -IR verbs, remove the infinitive ending to find the stem and add the endings in the table below.
French regular -IR verb conjugations | |||||
To conjugate an -IR verb in the present tense, remove the infinitive ending and then add the appropriate endings. For example, here are the present tense conjugations for the regular -IR verbs choisir (to choose), finir (to finish), and réussir (to succeed): | |||||
| Pronoun | Ending | choisir > chois- | finir > fin- | réussir > réuss- | |
| je | -is | choisis | finis | réussis | |
| tu | -is | choisis | finis | réussis | |
| il | -it | choisit | finit | réussit | |
| nous | -issons | choisissons | finissons | réussissons | |
| vous | -issez | choisissez | finissez | réussissez | |
| ils | -issent | choisissent | finissent | réussissent | |
| Regular -IR verbs share conjugation patterns in all tenses and moods. | |||||


