You already know how to form both past tenses. The thing that trips you up is choosing which one in real time, while you're talking, with no time to think. You need a decision that fires in half a second.
Here it is: am I taking a photo, or filming a movie?
Part of the series French Conjugation Memory Tricks.
The image
- Passé composé = a photo. A single, finished snapshot. Something happened, it had a clear beginning and end, click, it's over. J'ai mangé. ("I ate" — done.)
- Imparfait = a movie. An ongoing scene that's still rolling. A description, a state, a background, a habit that loops. Je mangeais. ("I was eating / I used to eat" — the scene keeps going.)
Before you pick a past tense, freeze for a fraction of a second and ask: is this moment a photo or a movie? That one question resolves the majority of cases.
Run it on real sentences
Hier, j'ai mangé une pizza. → A finished event. Photo. → passé composé. Quand j'étais petit, je mangeais beaucoup de bonbons. → An ongoing, repeated habit. Movie. → imparfait. Il faisait beau. → A description, the scene's backdrop. Movie. → imparfait. Elle est arrivée à 8h. → A single, clock-stamped event. Photo. → passé composé.
Weather, feelings, age, time of day, what things were like — those are always the movie (imparfait). Anything you could timestamp or count — those are photos (passé composé).
The combo that makes it cinematic
The trick really earns its keep when both tenses appear in one sentence. Picture a movie playing — and then someone takes a photo in the middle of it:
Je dormais (movie — the scene) quand le téléphone a sonné (photo — the snap). (I was sleeping when the phone rang.)
Nous mangions (movie) quand elle est entrée (photo). (We were eating when she came in.)
The long, ongoing background is the movie (imparfait). The short, sudden thing that interrupts it is the photo (passé composé). If you can see the scene and spot the flash, you've conjugated the sentence correctly.
When the image is genuinely ambiguous
Some verbs can be either, and the meaning changes depending on which you pick — because you're literally choosing photo vs movie:
| Verb | Photo (passé composé) | Movie (imparfait) |
|---|---|---|
| savoir | j'ai su = I found out (a moment) | je savais = I knew (ongoing state) |
| vouloir | j'ai voulu = I tried (a single attempt) | je voulais = I wanted (ongoing desire) |
| pouvoir | j'ai pu = I managed to (a completed success) | je pouvais = I was able to (background ability) |
State verbs like être, avoir, savoir, vouloir, pouvoir default to the movie (they describe ongoing states), which is why they're usually imparfait — until you specifically mean the snapshot moment.
Keyword backup (when the image is fuzzy)
If you can't tell photo from movie fast enough, the adverbs usually decide for you:
| Signals a photo (passé composé) | Signals a movie (imparfait) |
|---|---|
| hier, ce matin, une fois | tous les jours, souvent, toujours |
| soudain, tout à coup | d'habitude, chaque matin |
| à 8 heures, la semaine dernière | quand j'étais petit, pendant que |
But lead with the image — keywords are the fallback, not the primary tool.
Drill plan
- For every past sentence, say "photo" or "movie" out loud before conjugating. Train the reflex.
- Practice the interruption combo (movie + photo) until the pattern is automatic.
- Drill the meaning-changing verbs (savais vs ai su) as a special set.
- Type full past-tense sentences so you're choosing in context, the way you will when speaking.
For the deeper rule-by-rule breakdown — including all four cases and the full keyword tables — see passé composé vs imparfait. This post is the memory hook; that one is the complete manual.
FAQ
What is the photo vs movie trick for French past tense?
Passé composé is a photo: a single completed action, a snapshot with a clear start and end (j'ai mangé). Imparfait is a movie: an ongoing scene, description or repeated habit still rolling in the background (je mangeais). When choosing a past tense, ask: am I taking a photo or filming a scene?
How do I decide between passé composé and imparfait?
Ask whether the action is a finished snapshot or an ongoing scene. Finished, countable events are passé composé (a photo). Descriptions, states, weather, feelings and repeated habits are imparfait (a movie). When a sudden event interrupts a scene, the scene is imparfait and the interruption is passé composé.
Which past tense is used for descriptions in French?
Imparfait. Descriptions, states of being, weather, age, time of day and feelings are all ongoing background, the movie, so they take the imparfait: il faisait beau, j'étais fatigué, elle avait vingt ans. Completed actions within that scene switch to passé composé.
