Passé composé and imparfait are both French past tenses, but they do completely different jobs. Passé composé describes a completed action with a clear beginning and end. Imparfait describes a background state, a habit, or an action in progress. Once you understand that single distinction, 90% of the choices become automatic.

The Core Rule: Completed Action vs. Ongoing State

The passé composé describes an action that happened and ended — something you can pin to a specific moment or count. The imparfait describes something that was in progress, repeated regularly, or was simply a background condition when something else happened.

Think of it this way: passé composé is a snapshot — a single moment captured. Imparfait is a video — a state or process unfolding over time.

Both sentences use the same verb and the same person, but communicate fundamentally different things. Which tense you choose is not about when something happened — it is about how you present it.

Time Markers That Tell You Which Tense to Use

Certain French time expressions are almost always paired with a specific past tense. Memorising these as signals removes much of the guesswork and speeds up your writing in timed exam conditions.

  • Passé composé signals
  • Imparfait signals

These markers are not absolute rules, but they reliably identify the speaker's intent. If you see d'habitude, imparfait is almost always correct. If you see tout à coup, passé composé is almost always correct.

How to Build a Story Using Both Tenses Together

The clearest way to understand how the two tenses work together is the scene-and-action model. Imparfait sets the scene. Passé composé is the action that breaks into it.

Il faisait nuit et il pleuvait. Soudain, quelqu'un a frappé à la porte.

This pattern — imparfait for description, passé composé for events — is the backbone of French storytelling from A2 right through to DALF C1. Every narrative in a TCF Task 3 or DELF production écrite will use it. Practise writing short paragraphs that combine both tenses until the choice feels natural.

When the Same Verb Means Something Different in Each Tense

Several common French verbs change their meaning completely depending on which past tense is used. This is one of the most frequently tested distinctions in DELF B2 and DALF C1 exams — and one of the most reliable ways to demonstrate advanced mastery.

Je savais qu'il était là (I knew he was there — ongoing knowledge) is completely different from J'ai su qu'il était là (I found out he was there — a moment of discovery). Getting these right is a reliable marker of B2 level writing.

How to Practise Passé Composé and Imparfait Effectively

The fastest way to internalise both tenses is repetitive conjugation practice across multiple verbs and persons, followed by writing short paragraphs that use both together. Studying tables alone is not enough — you need to produce the forms automatically under time pressure.

Use the French Verb Conjugator to pull up side-by-side conjugation tables for any verb. Work through both the passé composé and imparfait columns, and pay special attention to the verbs that change meaning — savoir, pouvoir, vouloir, connaître — until you can produce both forms without pausing.

Then practise the scene-and-action model: write a three-sentence description of a past scene in the imparfait, then add one event in the passé composé. Repeat with different verbs every day. That habit, maintained over two or three weeks, will make the distinction automatic well before your exam.