Avoir
This verb has different stems for different tenses. These are imperfect av- /av/; present subjunctive ai- /ɛ/; future and conditional aur- /ɔʁ/; simple past and past subjunctive e- (not pronounced: eus, eusse are pronounced as bare inflections /y, ys/). Although the stem changes, the inflections of these tenses are as a regular -oir verb.
In the present, not only are there stem changes, but the inflections are irregular as well:
| Indicative | Subjunctive | Conditional | Imperative | |||||
|---|---|---|---|---|---|---|---|---|
| Present | Simple Past | Imperfect | Future | Present | Imperfect | Present | Present | |
| j' | ai /e/ | eus /y/ | avais /avɛ/ | aurai /ɔʁe/ | aie /ɛ/ | eusse /ys/ | aurais /ɔʁɛ/ | |
| tu | as /a/ | eus /y/ | avais /avɛ/ | auras /ɔʁa/ | aies /ɛ/ | eusses /ys/ | aurais /ɔʁɛ/ | aie* /ɛ/ |
| il/elle | a /a/ | eut /y/ | avait /avɛ/ | aura /ɔʁa/ | ait /ɛ/ | eût /y/ | aurait /ɔʁɛ/ | |
| nous | avons /avɔ̃/ | eûmes /ym/ | avions /avjɔ̃/ | aurons /ɔʁɔ̃/ | ayons /ɛjɔ̃/ | eussions /ysjɔ̃/ | aurions /ɔʁjɔ̃/ | ayons* /ɛjɔ̃/ |
| vous | avez /ave/ | eûtes /yt/ | aviez /avje/ | aurez /ɔʁe/ | ayez /ɛje/ | eussiez /ysje/ | auriez /ɔʁje/ | ayez* /ɛje/ |
| ils/elles | ont /ɔ̃/ | eurent /yʁ/ | avaient /avɛ/ | auront /ɔʁɔ̃/ | aient /ɛ/ | eussent /ys/ | auraient /ɔʁɛ/ | |
* Notice that the imperative form uses the subjunctive conjugation.
Non-finite forms:
- Infinitive: avoir /avwaʁ/
- Present participle: ayant /ejɑ̃/
- Gerundive: en ayant /an ejɑ̃/
- Verbal adjective: ayant(s) /ejɑ̃/, ayante(s) /ejɑ̃t/
- Past participle: eu(e)(s) /y/
Auxiliary verb: avoir
Read more about this topic: Soyez, Auxiliary Verbs