There are three major groups of regular verbs in French: verbs with infinitives ending in -er, verbs with infinitives ending in -ir, and verbs with infinitives ending in -re. The verb form that ends in -ER is called the infinitive (in English, the infinitive is the verb preceded by the word “to”), and -ER is the infinitive ending.
To conjugate these verbs in the present tense, drop the -er from the infinitive and add the correct endings given below:
1. – е 1. ons
2. – es 2. – ez
3. – e 3. – ent
In the video there is an example of conjugation with the verb chanter(to sing).