French has several past tenses, but two of them do almost all the work in everyday speech: the passé composé and the imparfait. Both land in English as a plain past — j'ai mangé and je mangeais can each come out as "I ate" — which is exactly why the choice feels arbitrary at first. It isn't. French isn't asking when something happened. It's asking what kind of past you mean: a finished event, or an ongoing situation. Once you hear that question underneath the sentence, the right tense mostly picks itself.
The one rule that does most of the work
Think of the two tenses as photo and film.
The passé composé is a photo: one finished action with edges. Something happened, it ended, you could count it. Hier, j'ai pris le train. — "Yesterday I took the train."
The imparfait is film: the scene running behind the action, with no clear start or stop. Description, habit, ongoing state. Quand j'étais petit, je prenais le train tous les jours. — "When I was little, I took the train every day."
Notice that both English sentences use "took." English collapses the distinction; French keeps it. That's the whole difficulty in one line — you're not translating a tense, you're choosing a point of view on the past.
The quick test: could you say "was/were doing" or "used to do" in English without changing the meaning? If yes, you want the imparfait. If it's "I did it, once, and it was over" — passé composé.
What the passé composé is for
Reach for it when the action has a boundary:
- A single completed event. Elle a ouvert la porte. (She opened the door.)
- A sequence of events — the spine of a story. Je me suis levé, j'ai pris un café et je suis parti. (I got up, had a coffee and left.)
- Something that happened a specific number of times. J'ai vu ce film trois fois. (I've seen that film three times.)
- An action with a stated duration that has ended. Il a habité à Lyon pendant cinq ans. (He lived in Lyon for five years.)
- A sudden interruption. Soudain, le téléphone a sonné. (Suddenly the phone rang.)
If you're telling someone what happened, you're mostly in the passé composé.
What the imparfait is for
Reach for it when there's no boundary:
- Description and background. Il faisait froid et la rue était vide. (It was cold and the street was empty.)
- Habits and repeated actions. On dînait toujours à huit heures. (We always had dinner at eight.)
- Ongoing physical, mental or emotional states. Je voulais rentrer. (I wanted to go home.) Elle avait l'air fatiguée. (She looked tired.)
- Age, time, weather. J'avais dix ans. (I was ten.) Il était minuit. (It was midnight.)
- Two things happening at once. Pendant qu'il cuisinait, je mettais la table. (While he cooked, I set the table.)
If you're setting the scene, you're in the imparfait.
A quick refresher on forming them
The passé composé is an auxiliary in the present (avoir or être) plus a past participle. Which auxiliary you need is its own question — the same one Italian learners face with the passato prossimo.
| Verb | Auxiliary | Participle | Full form |
|---|---|---|---|
| parler | avoir | parlé | j'ai parlé |
| finir | avoir | fini | j'ai fini |
| prendre | avoir | pris | j'ai pris |
| aller | être | allé(e) | je suis allé(e) |
| se lever | être | levé(e) | je me suis levé(e) |
The imparfait is mercifully regular. Take the nous form of the present, drop -ons, and add the endings:
| Person | Ending | parler (nous parlons → parl-) |
|---|---|---|
| je | -ais | je parlais |
| tu | -ais | tu parlais |
| il / elle | -ait | il parlait |
| nous | -ions | nous parlions |
| vous | -iez | vous parliez |
| ils / elles | -aient | ils parlaient |
That recipe works for every verb in the language except one: être, which uses the stem ét- (j'étais, nous étions). Verbs in -ger and -cer keep their soft sound with a spelling tweak (je mangeais, je commençais), and -ier verbs end up with a double i in the nous form (nous étudiions). That's the entire irregularity budget.
Trigger words that tip the balance
Certain time expressions almost always travel with one tense. They're not a law, but they're a very good prior:
| Usually passé composé | Usually imparfait |
|---|---|
| hier (yesterday) | souvent (often) |
| soudain, tout à coup (suddenly) | toujours (always) |
| un jour (one day) | tous les jours (every day) |
| d'abord, ensuite, puis, enfin (first, then…) | le samedi (on Saturdays) |
| une fois, deux fois (once, twice) | d'habitude (usually) |
| en 2019, ce jour-là (that day) | autrefois (back then) |
| pendant trois ans (for three years) | pendant que (while) |
The last row is the one learners trip on. Pendant trois ans names a closed stretch of time, so it takes the passé composé; pendant que introduces a scene running in parallel, so it takes the imparfait.
When both tenses appear in one sentence
This is where the distinction earns its keep. The imparfait paints the backdrop; the passé composé drops the event onto it:
- Je dormais quand tu as appelé. — I was sleeping when you called.
- Il pleuvait, alors nous sommes rentrés. — It was raining, so we went home.
- Elle lisait tranquillement quand la lumière s'est éteinte. — She was reading quietly when the light went out.
In every one of these, the imparfait clause is the situation and the passé composé clause is the thing that happened. Flip them and you change the story: Quand tu as appelé, j'ai dormi means the call came first and then you went to sleep.
Watch what happens when you swap a single tense:
| Sentence | Meaning |
|---|---|
| Il a été malade. | He got sick / he was sick (and got better). |
| Il était malade. | He was sick — that's the state he was in. |
| Nous avons habité à Paris. | We lived in Paris (a closed chapter). |
| Nous habitions à Paris. | We were living in Paris (the backdrop to something else). |
The verbs that change meaning with the tense
A short list of very common verbs shifts meaning depending on which past you use. These are worth learning as a set, because they show up constantly and the error is never silent — it says something you didn't mean:
| Verb | Imparfait | Passé composé |
|---|---|---|
| vouloir | je voulais — I wanted to | j'ai voulu — I decided to, I tried to |
| pouvoir | je pouvais — I was able to, in general | j'ai pu — I managed to, I pulled it off |
| pouvoir (negative) | je ne pouvais pas — I wasn't able to | je n'ai pas pu — I failed to, that one time |
| savoir | je savais — I knew | j'ai su — I found out |
| devoir | je devais — I was supposed to | j'ai dû — I had to, or: I must have |
| connaître | je connaissais — I knew (a person, a place) | j'ai connu — I met, I got to know |
| avoir peur | j'avais peur — I was afraid | j'ai eu peur — I got a fright |
So je voulais partir is "I wanted to leave" (and maybe didn't), while j'ai voulu partir is "I made the decision to leave." And the classic: je savais is "I knew all along," j'ai su is "that's the moment I found out."
Why drilling beats memorizing the rules
Rules get you off the ground. But a fluent speaker doesn't run the photo-or-film check mid-sentence — the right form simply arrives. The only way to get there is retrieval: producing je prenais and j'ai pris in real contexts, over and over, spaced out over weeks so each pairing locks in.
That's exactly what spaced repetition is built for. Rather than re-reading the rule, you practise producing the form until it's automatic, and the schedule puts each review right at the point you're about to forget — flattening the forgetting curve so the distinction sticks instead of fading between lessons.
It also solves the quieter problem: the passé composé needs the participle and the auxiliary, and the irregular participles (pris, mis, dû, né, vécu) are just vocabulary. They respond to exactly the same treatment as noun genders — learn the whole unit at once, drill it on a schedule.
A short daily routine
Ten focused minutes beats an occasional two-hour cram:
- Clear what's due. Review first, then learn. Yesterday's forms are the ones at risk today.
- Store verbs as whole units. Not prendre alone, but prendre – je prenais – j'ai pris. The tense contrast travels with the word.
- Narrate one thing from your day. Two sentences, out loud: one scene in the imparfait, one event in the passé composé. This is the cheapest possible production practice.
- Play it in. A round of the matching game or typing trainer drills verb forms without it feeling like study.
Ready to put it into practice? LexiNest's free French course runs in your browser, works offline, and uses spaced repetition so the past tenses move from "I have to think about it" to "I just know."
Frequently asked questions
What is the difference between passé composé and imparfait?
The passé composé describes a finished action with clear edges — something that happened and ended (j'ai pris le train). The imparfait describes an ongoing situation, habit or state with no clear boundary (je prenais le train tous les jours). English usually translates both as a simple past, which is why the distinction has to be learned rather than felt.
How do I know which past tense to use in French?
Ask whether you could say "was doing" or "used to do" in English. If yes, use the imparfait. If the action is a single completed event, a sequence of events, or something that happened a set number of times, use the passé composé. Time expressions help too: hier and soudain point to the passé composé, souvent and tous les jours to the imparfait.
Can passé composé and imparfait be used in the same sentence?
Yes, and it's extremely common. The imparfait sets the scene and the passé composé delivers the event that cuts into it: Je dormais quand tu as appelé — "I was sleeping when you called." Reversing the tenses changes which action was already under way.
Is the imparfait hard to conjugate?
No — it's the most regular tense in French. Take the nous form of the present, drop -ons, and add -ais, -ais, -ait, -ions, -iez, -aient. Only être is irregular (j'étais), with minor spelling adjustments for -ger and -cer verbs.
Why does vouloir mean something different in each tense?
Because the tense marks whether the state was ongoing or resolved. Je voulais partir is an ongoing desire — "I wanted to leave," with no word on whether you did. J'ai voulu partir frames it as a completed act of will — "I decided to leave." The same shift affects pouvoir, savoir, devoir and connaître.