Conjugation of French verbs

In French language, verbs have the particularity to be divided in 3 groups.

First group of french verbs

Those are verbs which finish by "er” at the infinitve form and by "e" at the first person of the indicativ present.

The first conjugation class consists of all French verbs with infinitives ending in -er, except for the irregular verb aller; the verbs in this conjugation, which together constitute the great majority of French verbs, are all conjugated similarly, though there are a number of subclasses with minor changes arising from orthographical and phonological considerations.

Second group of french verbs

Those are verbs which finish by "ir” and showing and indicative form for present in "is” with also a participle present in "issant”.

The second conjugation class consists of most French verbs with infinitives ending in -ir, as well as a few verbs in -ïr; these verbs are all conjugated identically (except for the diæresis mark in -ï-), and reflect the Latin inchoative infix -isc-/-esc- (though the modern French -iss- does not retain any aspectual semantics).

Third group of french verbs

It is a category including all other verbs such as :
- aller
- verbs that finish by " ir " and that don’t have indicative present in " is " and participle present in " issant” such as : partir ( to leave ), cueillir
- verbs that finish in " oir " or " re " such as : recevoir, rendre.

The third conjugation class consists of all other French verbs : aller, a number of verbs in -ir (including all verbs in -oir, which is an etymologically unrelated ending), and all verbs in -re. Nonetheless, this class is very small compared to the other two, though it does contain some of the most common verbs. This class has a few dozen subclasses, often differing substantially; indeed, this class is essentially a catch-all for verbs, besides être and avoir, that do not fit into the first two classes.