Open any French conjugation chart and you'll spot it: futur simple and conditionnel présent are spelled almost identically. The stem is the same. Even most of the endings are the same. There's basically one letter of difference per pronoun.
That's the trap. They look similar, but they mean completely different things. Mixing them up in real speech is the #1 reason you'll get the kind of look French speakers reserve for "I just said something weird."
Here's how to keep them straight.
What each tense means
Futur simple = something that will happen. Plain statement of fact about the future.
Demain, je parlerai à mon patron. Tomorrow, I will speak to my boss.
Conditionnel = something that would happen, under some condition, hypothetically, or politely.
Si j'avais le temps, je parlerais à mon patron. If I had the time, I would speak to my boss.
In English: "will" vs "would". One letter. Same difference in French, but masked by the conjugation.
The conjugation: a side-by-side
Both tenses start from the same stem (usually the infinitive). The endings are where they split.
Using parler (to speak), stem = parler-:
| Futur simple ("will speak") | Conditionnel ("would speak") | |
|---|---|---|
| je | parlerai | parlerais |
| tu | parleras | parlerais |
| il / elle | parlera | parlerait |
| nous | parlerons | parlerions |
| vous | parlerez | parleriez |
| ils / elles | parleront | parleraient |
Spot the pattern
- Futur simple endings: -ai, -as, -a, -ons, -ez, -ont (basically
avoirin the présent) - Conditionnel endings: -ais, -ais, -ait, -ions, -iez, -aient (the imparfait endings)
💡 The mental shortcut: Conditionnel = futur stem + imparfait endings. If you've already learned the imparfait, you've already learned half the conditionnel.
Memorize the irregular stems (they're shared)
Both tenses use the same irregular stems. Learn them once, get both tenses for free.
| Infinitive | Shared stem | Futur ex. | Conditionnel ex. |
|---|---|---|---|
| être | ser- | je serai | je serais |
| avoir | aur- | j'aurai | j'aurais |
| aller | ir- | j'irai | j'irais |
| faire | fer- | je ferai | je ferais |
| pouvoir | pourr- | je pourrai | je pourrais |
| vouloir | voudr- | je voudrai | je voudrais |
| savoir | saur- | je saurai | je saurais |
| voir | verr- | je verrai | je verrais |
| devoir | devr- | je devrai | je devrais |
| venir | viendr- | je viendrai | je viendrais |
This is why the irregular stem list is one of the best return-on-investment sessions you can do as an intermediate learner: it unlocks two full tenses across the highest-frequency verbs in the language.
The trigger words that should fire each tense
Futur simple triggers
- demain (tomorrow)
- la semaine prochaine (next week)
- dans deux jours (in two days)
- un jour (one day)
- quand (when, in a future context), "Quand je serai grand…"
Un jour, je vivrai à Paris. One day, I will live in Paris.
Conditionnel triggers
- si + imparfait clauses ("if X, then…"), the big one
- j'aimerais / je voudrais (I'd like), polite requests
- on pourrait (we could), soft suggestions
- tu devrais (you should), advice
- Reported speech in the past ("she said she would…")
Si j'étais riche, je voyagerais partout. If I were rich, I'd travel everywhere. Je voudrais un café, s'il vous plaît. I would like a coffee, please.
The polite-request use case (Pro tip)
This is where the conditionnel earns its keep in daily life. Replacing a verb's présent with its conditionnel makes the request more polite. It's the French equivalent of "could you" instead of "can you".
| Direct (présent) | Polite (conditionnel) |
|---|---|
| Je veux un café. | Je voudrais un café. |
| Tu peux m'aider ? | Tu pourrais m'aider ? |
| Vous avez l'heure ? | Vous auriez l'heure ? |
| On fait une pause. | On ferait une pause ? |
Café, bakery, post office, taxi, switching to the conditionnel here is the single biggest "you sound more French" upgrade you can make as a learner.
The si-clause sequence (memorize this table)
If-then sentences ("if X, then Y") follow a strict tense pairing. There are exactly three patterns:
| Si clause (the "if") | Main clause (the "then") | Meaning |
|---|---|---|
| présent | présent / futur / impératif | General truth or real future. "S'il pleut, je reste." |
| imparfait | conditionnel | Hypothetical / counterfactual present. "Si j'avais le temps, je viendrais." |
| plus-que-parfait | conditionnel passé | Hypothetical past. "Si j'avais su, je serais venu." |
⚠️ Never put a futur or conditionnel in the si clause itself. "Si je viendrais…" is wrong. It should be "si je venais…". English speakers do this constantly because we say "if I would…". French doesn't.
The mental test for "did I pick the right one?"
Before saying the sentence out loud, ask:
- Is there an "if" clause attached? → conditionnel (in the main clause).
- Am I being polite? → conditionnel.
- Am I reporting what someone said in the past? → conditionnel ("she said she would come").
- None of the above, just a future fact? → futur simple.
If the answer to questions 1–3 is no, you almost certainly want the futur simple.
Why this becomes automatic (eventually)
You can read this article 10 times and still freeze mid-sentence at the bakery. Because choosing between "will" and "would" in French is a production decision, split-second, context-sensitive. The only way to make it automatic is reps under pressure.
Bonjour Verbs drills both tenses across the irregular-stem list, with sentence-completion practice that includes the si-clause pairings. By the time you finish the milestone, "Si j'avais le temps, je ____ (parler)" triggers parlerais without thinking, because your brain has been wired to associate "si + imparfait" with the conditionnel ending.
Conjugate parler in every tense → · All French verb conjugations →