Passé Composé vs Imparfait
The two simple French past tenses split English's single past tense between them. The rules are clear once you have them.
The decision rules
Passé composé for:
- Completed events in a closed time frame (hier, la semaine dernière, en 2020)
- Actions with a specified duration that has ended (j'ai travaillé deux heures, j'ai vécu là cinq ans)
- A single event, or a sequence of events forming a narrative
- The interrupting event in a "while X was happening, Y happened" structure
- Sudden changes of state (j'ai eu peur, il s'est mis à pleuvoir)
Imparfait for:
- Habitual or repeated actions (every day, every Sunday, used to)
- Ongoing past actions ("was X-ing")
- Background description (the scene, the weather, ages, time of day)
- Mental and emotional states (savoir, vouloir, penser, croire as background states)
- The interrupted action in a "while X was happening, Y happened" structure
Time markers as triggers
| Triggers passé composé | Triggers imparfait |
|---|---|
| hier | souvent |
| hier soir | toujours |
| la semaine dernière | tous les jours |
| l'année dernière | chaque dimanche |
| en 2020 | pendant que |
| il y a deux ans | quand j'étais petit |
| une fois | à cette époque |
| soudain / tout à coup | d'habitude |
| ce matin | normalement |
If one of these markers appears, the tense choice is mostly decided. When neither appears, you decide by context.
Side-by-side examples
| Passé composé | Imparfait | Notes |
|---|---|---|
| Hier, j'ai mangé une pizza. | Je mangeais de la pizza tous les dimanches. | One occasion vs habit |
| J'ai habité à Paris cinq ans. | J'habitais à Paris quand j'étais étudiant. | Bounded duration vs background |
| Je suis allé au cinéma hier soir. | J'allais au cinéma chaque vendredi. | One event vs habit |
| Marie est arrivée à huit heures. | Quand je suis arrivé, Marie parlait au téléphone. | Bounded events vs the ongoing one |
| Il a fait très chaud samedi. | Il faisait très chaud. | Closed past vs setting the scene |
| J'ai eu une voiture rouge (bought and sold). | J'avais une voiture rouge (the one I owned). | Bounded ownership vs ongoing state |
The interruption pattern
A characteristic French past-tense structure: imparfait for the ongoing background action, passé composé for the event that interrupts it.
- Quand je suis arrivé, Marie dormait. (When I arrived, Marie was sleeping.)
- Pendant que je parlais avec ma mère, le téléphone a sonné. (While I was talking with my mother, the phone rang.)
- Je prenais une douche quand l'eau s'est coupée. (I was taking a shower when the water cut off.)
The imparfait sets the stage; the passé composé delivers the event. This is the bedrock structure of French narration.
States vs events: the verb shift
A small group of common verbs shifts meaning between the two tenses. Worth memorising as a set.
| Verb | Imparfait (state) | Passé composé (event) |
|---|---|---|
| savoir | je savais = I knew (a fact) | j'ai su = I found out, learnt |
| connaître | je connaissais = I knew (someone) | j'ai connu = I met (for the first time) |
| vouloir | je voulais = I wanted | j'ai voulu = I tried, decided to |
| pouvoir | je pouvais = I could | j'ai pu = I managed to |
| avoir | j'avais = I had (state) | j'ai eu = I got, received |
| devoir | je devais = I was supposed to | j'ai dû = I had to (and did) |
Examples:
- J'ai connu ma femme en 2010. (I met my wife in 2010 - the event.)
- Je connaissais Marie depuis l'école. (I'd known Marie since school - the ongoing state.)
- J'ai su la vérité hier. (I found out the truth yesterday - moment of finding out.)
- Je savais la vérité depuis des mois. (I had known the truth for months - state.)
- J'ai voulu partir. (I decided to leave / I tried to leave.)
- Je voulais partir. (I wanted to leave - ongoing wish.)
These distinctions don't translate cleanly. French is doing semantic work in the choice of tense.
Worked examples
- L'année dernière, je suis allé en Italie et j'ai visité Rome. (Last year I went to Italy and visited Rome.) - bounded passé composé chain
- Quand j'étais petit, ma famille et moi allions à la plage chaque été. (When I was little, my family and I used to go to the beach every summer.) - habitual imparfait
- Marie préparait le dîner quand je suis rentré. (Marie was cooking dinner when I came home.) - imparfait + passé composé
- Le restaurant était plein et il faisait très chaud. (The restaurant was full and it was very hot.) - background imparfait
- J'ai commencé à étudier à huit heures et j'ai fini à onze heures. (I started studying at eight and finished at eleven.) - bounded passé composé
- Quand le téléphone a sonné, je dormais profondément. (When the phone rang, I was deeply asleep.) - interruption
Common mistakes English speakers make
Defaulting to passé composé for everything because it feels closer to English simple past. Imparfait covers habitual and ongoing past, and missing it is the surest marker of an English-speaking learner. Conversely, using imparfait for a bounded event because the duration is long: j'ai habité à Paris cinq ans is passé composé (bounded duration, ended), not imparfait. And missing the meaning-shifting verbs - j'ai connu Marie and je connaissais Marie are genuinely different sentences and shouldn't be used interchangeably.
See also
- The passé composé page covers the full passé composé formation including être verbs.
- The imparfait page covers imparfait formation and the time markers that trigger it.
- The intermediate French grammar page covers the full past-tense system including the plus-que-parfait (past perfect).