French stem-changing verbs are conjugated with the same endings as regular -ER verbs but have two different radicals or stems. These stem changes occur in several French tenses and moods and moods, as shown in the following table. For -eler verbs and -eter verbs, the L or T, respectively, is doubled.
| In the present tense, subjunctive, and imperative, the stem change occurs in all conjugations except nous and vous: | ||
| Present | ||
| j'appelle | je jette | |
| tu | appelles | jettes |
| il | appelle | jette |
| nous | appelons | jetons |
| vous | appelez | jetez |
| ils | appellent | jettent |
| Subjunctive | ||
| j'appelle | je jette | |
| tu | appelles | jettes |
| il | appelle | jette |
| nous | appelions | jetions |
| vous | appeliez | jetiez |
| ils | appellent | jettent |
| Imperative | ||
| (tu) | appelle | jette |
| (nous) | appelons | jetons |
| (vous) | appelez | jetez |
| In the future and conditional, the stem change occurs in all conjugations. There is no stem change in the imperfect, present participle, past participle, passé simple, or imperfect subjunctive. | ||
| See these verbs conjugated in all tenses: | ||
| appeler | jeter | |
| Note: The affected conjugations of these stem-change patterns are the same for all the different types of stem-changing verbs. | ||
