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How to Conjugate Irregular Verbs in French

French irregular verbs

French verbs of the third group are very (very) tricky to conjugate. Not because of the way they end (that's tricky enough), but because in many cases the very useful root we've been using for the other 2 verb groups changes into forms hard to recognize by non-French speakers.

The only way to truly learn the conjugation of the French verbs in this group is to go over all of them. Fortunately, as explained in a previous learn French grammar lesson, the conjugation of many of these verbs follow the conjugation of a “master” verb in each sub-category. Once you learn what that verb is for each sub-group, and learn its conjugation, you will have the master keys to rule them all. In terms of endings, the table below summarizes all the endings for group 3 (but not the changes of the roots).

Conjugation rules:

Step 1: Take the French verb from the third group. Remove the ending from the infinitive form. Modify the root according to the tense. We'll use vouloir/to want, prendre/to take, ouvrir/to open as examples. In the case of vouloir, you might think the root would be voul-
 but not so. In the first person of the present tense, for example, I want is “Je veux“. The root has disappeared and is now unrecognizable.

Step 2: Add the ending that corresponds to the appropriate tense and person. In this case, the endings can still be easily summarized.

Je/I Tu/you Il,elle,on/he,she,it
Présent ouvreprends veux ouvresprends veux ouvreprend veut
Imparfait ouvraisprenais voulais ouvraisprenais voulais ouvraitprenait voulait
Passé simple ouvrispris voulus ouvrispris voulus ouvritprit voulut
Futur simple ouvriraiprendrai voudrai ouvrirasprendras voudras ouvriraprendra voudra
Subjonctif présent ouvreprenne veuille ouvresprennes veuilles ouvreprenne veuille
Sujonctif Imparfait ouvrisseprisse voulusse ouvrissesprisses voulusses ouvrßtprßt voulût
ImpĂ©ratif – ouvreprends veuille –
Infinitif ouvrirprendre vouloir
Participe présent ouvrantprenant voulant
Participe passé ouvertpris voulu # fui
Nous/we Vous/you Ils,elles/they
PrĂ©sent ouvronsprenons voulons ouvrezprenez voulez ouvrentprennent veulent ‡ font
Imparfait ouvrionsprenions voulions ouvriezpreniez vouliez ouvraientprenaient voulaient
Passé simple ouvrßmesprßmes voulûmes ouvrßtesprßtes voulûtes ouvrirentprirent voulurent
Futur simple ouvrironsprendrons voudrons ouvrirezprendrez voudrez ouvrirontprendront voudront
Subjonctif présent ouvrionsprenions voulions ouvriezpreniez vouliez ouvrentprennent veuillent
Sujonctif Imparfait ouvrissionsprissions voulussions ouvrissiezprissiez voulussiez ouvrissentprissent voulussent
ImpĂ©ratif ouvronsprenons voulons ouvrezprenez voulez –
Infinitif
Participe présent
Participe passé

Added for illustration purposes: faire => ils font

All tenses of the subjunctive are introduced by a “que” conjunction (e.g. que je veuille/that I want)

  • Infinitives of the 3rd group are too many too list in the table (see previous lessons). They all give rise to different roots that change according to the tense.

Added for illustration purposes: fuir => tu as fui

The above covers the simple tenses of the 3rd group of verbs. As you can see, they're anything but simple. But if you learn the table, you will have taken a great step in the right direction!

Examples:

Présent: Il accueille les invités / He greets the guests

Imparfait: Nous cuisions une omelette / We were cooking an omelette

Passé Simple: Tu dus partir rapidement / You had to leave rapidly

Futur Simple: Je dirai la vérité / I will tell the truth

Subjonctif Présent: Il faut que vous dormiez plus longtemps / You must sleep more

Subjonctif Imparfait: Il fallait qu'elles réfléchissent avant qu'elles n'écrivassent au juge / They had to think things through before they could write to the judge

Impératif: Asseyez vous! / Sit down!

Infinitif: Il faut avoir le courage de ses convictions / One must have the courage of one's convictions

Participe Présent: Elle a pleuré en voyant le chat blessé / She cried upon seeing the wounded cat

Participe Passé: Il a vécu au Japon / He has lived in Japan


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