Past tenses

Imperfect or Passé composé?

Understanding the fundamental difference once and for all.

Choosing between the imperfect and the passé composé is one of the most classic difficulties in French. Both express the past, but they describe different realities.

The fundamental difference

Imperfect (imparfait) → background, duration, habit

An action that was ongoing, repeated, or formed the backdrop of a story.

Passé composé → completed action, single event

An action that is finished, that happened once (or a defined number of times).

The film metaphor

Think of a film: the imperfect describes the setting and atmosphere (what was already there); the passé composé tells the events that move the story forward.

Il faisait nuit, il pleuvait. Soudain, la porte s'est ouverte.

It was night, it was raining. Suddenly, the door opened. — Imperfect: setting. Passé composé: sudden event.

Time markers

ImperfectPassé composé
toujours, souvent (always, often)une fois, soudain (once, suddenly)
tous les jours, chaque matin (every day)hier, ce matin-là (yesterday, that morning)
autrefois, à cette époque (in those days)en 1990, le 3 juin (in 1990, on June 3rd)
pendant que (while)quand / lorsque + sudden action

Compared examples

Quand j'étais enfant, je jouais au foot tous les mercredis.

When I was a child, I used to play football every Wednesday. (habit → imperfect)

Mercredi dernier, j'ai joué au foot avec mes amis.

Last Wednesday, I played football with my friends. (specific event → passé composé)

Je lisais quand le téléphone a sonné.

I was reading (ongoing) when the phone rang (interruption).

The same verb changes meaning

VerbImperfectPassé composé
savoirJe savais (I knew)J'ai su (I found out / I learned)
connaîtreJe connaissais (I was familiar with)J'ai connu (I met for the first time)
pouvoirJe pouvais (I was able to)J'ai pu (I managed to / succeeded in)
vouloirJe voulais (I wanted)J'ai voulu (I tried to / decided to)

Conjugate any French verb at all tenses and moods.

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