Conditionnel vs. Imparfait: Telling Them Apart in Sound and Spelling

The French conditionnel and the imparfait look almost identical on the page. Both end in -ais, -ais, -ait, -ions, -iez, -aient. Both have the same first-and-second-person plural pattern (-ions / -iez) and the same silent third-person plural ending (-aient). For a beginner, the two paradigms can blur into one fuzzy mass of -ais-shaped endings — and once you start writing, choosing the wrong one becomes a recurring slip.

This page lays out the difference in three places where it actually shows up: the stem, the pronunciation, and — on top of all that — the closely related futur form, which differs from the conditionnel by a single sound. By the end, you should be able to look at a verb form, listen to a verb form, or write one, and know instantly which paradigm you're dealing with.

The endings really are identical

Before we look at the differences, let us be clear about what the two paradigms have in common. The endings are the same, character for character.

Whatever the verb, whatever the tense (imparfait or conditionnel), these are the endings. There is no escaping them, and there is no morphological hint inside the endings themselves to tell you which tense you're in. The whole game is in the stem that comes before them.

The decisive difference: the stem

The two tenses use completely different stems.

Imparfait stem: take the nous form of the present indicative, drop the -ons. (nous parlons → parl-; nous finissons → finiss-; nous vendons → vend-.)

Conditionnel stem: same as the futur stem — usually the infinitive itself, sometimes with the silent e of -er / -re infinitives reduced (parler-, finir-, vendr-). For irregulars, you must memorize them, but they are exactly the same as the futur (être → ser-, avoir → aur-, aller → ir-, faire → fer-, venir → viendr-, voir → verr-, pouvoir → pourr-, etc.).

The difference is structural: the imparfait stem is a stripped-down present, while the conditionnel stem is the infinitive turned into a base for inflection. They almost never coincide.

For parler:

The visual difference is the -er- before the ending: parler-AIS (conditional) vs. parl-AIS (imparfait). For -er verbs, this means an extra two letters and an extra syllable. For -ir and -re verbs, the difference is even more visible — finir- vs. finiss-; vendr- vs. vend-.

The pronunciation difference

The endings sound the same — -ais, -ait, and -aient are all pronounced /ɛ/, the open e sound of English "bed." The pronunciation difference comes from the stem ending in /ʁ/, which the imparfait stem does not have.

For parler:

The conditionnel has an extra syllable — the /lə.ʁɛ/ at the end — that the imparfait simply doesn't have. In careful speech, the contrast is unmistakable. In casual rapid speech, the schwa /ə/ in parle- can drop almost entirely, but the /ʁ/ before the final /ɛ/ remains audible. If you hear an /ʁ/ right before the /ɛ/ ending, you are hearing the conditionnel.

Read these two sentences aloud and listen for the extra syllable in parlerais. The imparfait parlais is two beats; the conditionnel parlerais is three.

Critical pairs to drill

For high-frequency verbs, drilling the pronunciation contrast is the fastest way to lock the distinction in. Here are the most useful minimal pairs.

être

These two are the clearest case in the whole language: the imparfait stem of être is ét- (from nous étions), while the conditionnel/futur stem is ser-. Different stem, different sound, no possible confusion.

avoir

Same story: imparfait av- (from nous avons) vs. conditionnel/futur aur-. The vowels differ — /a/ vs. /o/ — and the consonants differ — /v/ vs. /ʁ/.

faire

This pair is the trickiest of all. Both forms have a /fə/ syllable. The distinguishing sound is the consonant inside the second syllable: /z/ in the imparfait faisais, /ʁ/ in the conditional ferais. They differ by a single phoneme — but it is a phoneme that completely changes the meaning of the sentence.

Note also that faisais is one of the few French words where the spelled ai is pronounced /ə/, not /ɛ/ — a holdover from older spelling. Faisais /fə.zɛ/, faisons /fə.zɔ̃/, faisait /fə.zɛ/. Listen for the schwa, not the open /ɛ/, in the first syllable of faisais.

aller

The two forms share no sounds at all — aller has a wildly suppletive futur/conditionnel stem (ir-), unrelated to the present vais / vas. So the pair is easy: completely different syllables.

vouloir, pouvoir, devoir

These three modal verbs are extremely common in the conditionnel (je voudrais, je pourrais, je devrais) and rarely in the imparfait — but the pairs are still worth knowing.

The futur vs. conditionnel pair: a single-vowel distinction

There is one further pair to address, because once you have separated the conditionnel from the imparfait, you still need to distinguish the conditionnel from the futur simple. Both share the same stem; the difference lives entirely in the ending — and specifically in the vowel of the je form.

Futur: je parlerai /paʁ.lə.ʁe/ — closed é sound. Conditionnel: je parlerais /paʁ.lə.ʁɛ/ — open è sound.

The first-person singular forms differ by one phoneme: /e/ (closed e, like the é in café) vs. /ɛ/ (open e, like the è in père or English bed).

This is one of the trickiest pronunciation contrasts in modern French because in some regional and casual accents the /e/ /ɛ/ distinction is fading — many speakers pronounce both je serai and je serais identically, as either /e/ or /ɛ/. In careful Parisian speech and in formal contexts, the contrast is preserved, and exams (DELF, TCF) expect you to make and hear it. Even where the spoken contrast collapses, the spelling still distinguishes them — -ai (futur, no s) vs. -ais (conditionnel, with s) — and writing the wrong one is a clear error.

The grammatical contrast tracks the pronunciation contrast: the futur /e/ is for direct future statements, and the conditionnel /ɛ/ is for hypotheticals, polite requests, and future-in-the-past.

Reading vs. writing: which form do I need?

The conditionnel and imparfait do completely different jobs in a sentence. Reading is the test: if you can decide what the sentence means, you know which tense it carries.

If a sentence pairs with a si-clause in the imparfait, the main clause needs the conditionnel. If a sentence describes what someone used to do, you need the imparfait. The form follows the meaning.

The two sentences look almost identical and share the same vocabulary, but the verb forms differ by a single morpheme (voyageais vs. voyagerais) — and that morpheme carries the whole difference between I traveled and I would travel.

A trickier pair: nous and vous forms

The first-person plural and second-person plural endings (-ions / -iez) deserve a note because they look identical across imparfait and conditionnel — the difference shows up only in the stem. There is no e/ɛ distinction here, just the question of whether the stem ends in -r- or not.

For nous and vous in -er verbs, the imparfait/subjonctif/conditionnel forms can collide visually. Nous parlions is the imparfait of parler; que nous parlions is the subjonctif présent. They are spelled identically but live in different syntactic frames. The conditionnel nous parlerions is unambiguous because the -r- before the ending tells you which tense you are in.

Common Mistakes

Mistake 1: Writing je parlais when you mean the conditionnel.

Mistake 2: Confusing je serai (futur) and je serais (conditionnel) in writing.

Mistake 3: Using j'avais in a conditional main clause where j'aurais belongs.

Mistake 4: Spelling faisais with ais but pronouncing it /fɛ.zɛ/ instead of /fə.zɛ/.

Mistake 5: Adding -r- in the imparfait by analogy with the conditionnel.

Key takeaways

• The endings of the imparfait and conditionnel are identical — -ais, -ais, -ait, -ions, -iez, -aient. The whole distinction lives in the stem.
• Imparfait stem = nous form of the present minus -ons (nous parlons → parl-). Conditionnel stem = same as the futur stem (parler-, ser-, aur-, fer-, ir-).
• In pronunciation, the conditionnel always has /ʁ/ before the ending: parlerais /paʁ.lə.ʁɛ/, three syllables; parlais /paʁ.lɛ/, two syllables.
• Closed pairs to drill: j'étais / je serais, j'avais / j'aurais, je faisais / je ferais, j'allais / j'irais.
• The futur and conditionnel differ by a single vowel in the je form: je serai /sə.ʁe/ (closed e) vs. je serais /sə.ʁɛ/ (open e). The spelling distinguishes them: -ai (no s, futur) vs. -ais (with s, conditionnel).
• Choose the form by meaning: habitual past or background → imparfait; politeness, hypothesis, or future-in-the-past → conditionnel.