French Imperfect Tense (Imparfait): Rules, Conjugation, and Examples

When narrating past events in French, learners face an inevitable rite of passage: understanding the difference between the Passé Composé and the Imparfait (imperfect tense). While the passé composé reports specific, completed actions, the imparfait sets the stage, paints background descriptions, and recounts habitual past behaviors.

In English, the imperfect tense often translates to "used to do" or "was/were doing." In this comprehensive guide from my-french.com, you will learn the exact formation formulas, key usage triggers, and practical tips to master this indispensable tense.

1. How to Form the French Imperfect Tense

The imperfect is celebrated by language learners for its high regularity. Unlike irregular tenses such as the present or future, almost every verb in the French language follows the exact same formula to construct the imperfect stem.

The 2-Step Formula:

1. Conjugate the verb in the present tense with nous.

2. Drop the -ons ending to get your stem, then append the universal imperfect endings.

Universal Imperfect Endings:

  • je : -ais
  • tu : -ais
  • il / elle / on : -ait
  • nous : -ions
  • vous : -iez
  • ils / elles : -aient

(Notice that the endings for je, tu, il, and ils share the identical phonetic sound: /ɛ/).

Step-by-Step Examples:

  • Aimer (to like/love)
  • Present: nous aimons → Stem: aim-
  • Conjugation: j'aimais, tu aimais, il aimait, nous aimions, vous aimiez, ils aimaient
  • Finir (to finish)
  • Present: nous finissons → Stem: finiss-
  • Conjugation: je finissais, tu finissais, elle finissait, nous finissions, vous finissiez, ils finissaient
  • Faire (to do/make)
  • Present: nous faisons → Stem: fais-
  • Conjugation: je faisais, tu faisais, on faisait, nous faisions, vous faisiez, ils faisaient

    • 2. The Lone Irregularity: "Être"

There is only one irregular stem in the entire French imperfect tense: the auxiliary verb être (to be). Because its present nous form (nous sommes) does not end in -ons, it takes the historical stem ét-:

  • J'étais (I was / used to be)
  • Tu étais
  • Il / Elle / On était
  • Nous étions
  • Vous étiez
  • Ils / Elles étaient

    • Orthographical Adjustments

  • Verbs in -ger (e.g., manger, voyager): add an e before endings starting with a to keep the soft "j" sound (je mangeais, but nous mangions).
  • Verbs in -cer (e.g., commencer): change c into ç before a to maintain the soft "s" sound (je commençais, but nous commencions).
  • Verbs with -i- stems (e.g., étudier, rire): keep the double i in the nous and vous forms (nous étudiions, vous riiez).

    • Be aware of minor spelling preservation rules for specific phonetic patterns:

    3. When to Use the Imperfect Tense

To know whether an English past sentence translates into the imperfect, look for context clues related to duration, continuity, and description.

A. Habitual or Repeated Actions ("Used to")

  • Tous les étés, nous visitions nos grands-parents. (Every summer, we used to visit our grandparents.)
  • Quand j'habitais à Paris, je prenais le métro chaque matin. (When I lived in Paris, I took the metro every morning.)

    • When describing an action that happened routinely over an indefinite period of time:

    B. Descriptions and Setting the Scene

  • Il était midi, et le soleil brillait intensément. (It was noon, and the sun was shining brightly.)
  • Thomas avait dix ans et semblait très timide. (Thomas was ten years old and seemed very shy.)

    • Use the imperfect for background details: physical descriptions, mental states, age, emotions, and weather conditions:

    C. Ongoing Action Interrupted by Another Event ("Was doing")

  • Je lisais un livre quand le téléphone a sonné. (I was reading a book when the telephone rang.)

    • When an ongoing, uncompleted action provides the backdrop for a sudden event:

    D. Conditional "Si" Clauses and Polite Requests

  • Si seulement j'avais plus d'argent ! (If only I had more money!)
  • Je voulais savoir si vous étiez disponible. (I wanted to know if you were available - used as a polite inquiry).

    • 4. Imparfait vs. Passé Composé: Quick Comparison

  • L'Imparfait is the scenery, lighting, and mood (continuous, descriptive, timeless).
  • Le Passé Composé is the scripted action (punctual, chronological, completed).

    • Think of a theatrical play:

    Practice Tip

    Scenario Imperfect (Imparfait) Passé Composé
    :--- :--- :---
    Focus Ongoing state / background Action with clear start/end
    Repetition Unspecified frequency (Habit) Counted occurrences (trois fois)
    Trigger words souvent, toujours, d'habitude soudain, hier, tout à coup

To cement the imperfect in your memory, practice writing a five-sentence paragraph recounting a typical weekend from your childhood. Use temporal triggers like "Quand j'étais petit(e)..." and "D'habitude, nous faisions...". Consistent practice with real-life memories makes the imperfect tense second nature!