https://languageatlas.com/french-a1/semi-regular-cer-verbs-conjugation-in-the-present-tense/

HOW to conjugate:

In order to conjugate semi-regular -cer verbs in the present tense one must:

1. Find the infinitive (full verb)
2. Cut off the -cer
3. Add the new ending (e, es, e, çons, ez, ent)

LES EXEMPLES

1. commencer

The full verb of “to start” is commencer in French.

1. commen

Once you cut of the cer ending all that is left is commen.

1. commençons

When we add the new çons ending, the final conjugated form will be commençons.

So if we wish to say “we begin” we say:

Nous commençons

Other RRR verb families:

• regular -er verbs
• regular -ir verbs