This French 4 lesson explains future perfect step by step, with examples in French and English. Then practise with the worksheet on future perfect and check yourself with the quiz.
Quick answer: The French future perfect (futur antérieur) names an action that will be completed before another future moment. Form it with the future of avoir or être plus a past participle: j’aurai fini, elle sera partie. It follows quand and dès que, and it also expresses probability about the past.
Level: French 4 (high school, ACTFL Intermediate Mid) · Standards: ACTFL Intermediate Mid, WL 1.2 Interpretive, WL 1.3 Presentational, WL 4.1 Language Comparisons
Future perfect: the lesson
What does the future perfect express?
Definition
The futur antérieur describes an action that will already be finished at a certain point in the future. Think of English will have + participle.
Demain à midi, Hind aura terminé son exposé. — By noon tomorrow, Hind will have finished her presentation.
How do you form the future perfect?
Rule
Future of avoir or être + past participle. The choice of auxiliary and the agreement are exactly the same as in the passé composé.
| Subject | With avoir: écrire | With être: arriver |
|---|---|---|
| je | j’aurai écrit | je serai arrivé(e) |
| tu | tu auras écrit | tu seras arrivé(e) |
| il / elle | il aura écrit | elle sera arrivée |
| nous | nous aurons écrit | nous serons arrivé(e)s |
| vous | vous aurez écrit | vous serez arrivé(e)(s) |
| ils / elles | elles auront écrit | ils seront arrivés |
When do quand, dès que and lorsque take the future perfect?
Rule
After quand, lorsque, dès que, aussitôt que and une fois que, put the first action in the futur antérieur and the next one in the simple future (or the imperative) when the first must be over.
Examples
- Dès que nous aurons visité le Vieux-Port, nous prendrons un thé. — As soon as we have visited the Old Port, we will have tea.
- Quand j’aurai économisé 500 €, j’achèterai une guitare. — When I have saved €500, I will buy a guitar.
- Une fois que tu auras lu ce chapitre, tu comprendras mieux. — Once you have read this chapter, you will understand better.
Watch out
English uses the present: when I get home, as soon as I finish. French needs a future: Quand j’arriverai, Dès que j’aurai fini, never Dès que j’ai fini for a future plan.
How do you express probability about the past?
The futur antérieur can also make a guess about something that has probably already happened. It often appears with sûrement or sans doute.
| French | Meaning |
|---|---|
| Il aura raté son train. | He probably missed his train. |
| Elles auront oublié l’heure. | They have probably forgotten the time. |
| Tu te seras trompé de salle. | You probably went to the wrong room. |
Culture note
The baccalauréat is the national exam that ends lycée in France, with results in early July. French teenagers often say Dans un mois, j’aurai mon bac while they wait.
Zoé’s tip
Draw a mini timeline. The event that happens first gets aurai / serai + participle; the later event stays in the simple future.
Key points to remember
- Formation: future of avoir or être + past participle (nous aurons fini, ils seront arrivés).
- After quand, lorsque, dès que, aussitôt que and une fois que, French uses a future tense where English uses the present.
- Use the futur antérieur for the action that comes first, the simple future for the next one.
- It can also guess about the past: Il aura raté son train means he probably missed his train.
- The same auxiliary rules as the passé composé apply, including agreement with être.
Will Have Done: Future Perfect Made Clear: frequently asked questions
How do you form the futur antérieur?
Conjugate avoir or être in the simple future and add the past participle: j’aurai fini, elle sera partie, nous nous serons levés. The auxiliary and the agreement follow the same rules as the passé composé.
Why does French use the future after quand and dès que?
French marks the time of the event itself, so a future plan needs a future tense even in the time clause. English uses the present instead, which is why dès que j’aurai fini is the right translation of as soon as I finish.
When do I choose the futur antérieur and not the simple future?
Choose the futur antérieur when the first action must be completely over before the second begins. If the actions are simultaneous or the order is unimportant, both clauses can use the simple future.
How does the futur antérieur show probability?
It guesses about a past event: il aura oublié means he has probably forgotten. Adverbs like sûrement or sans doute often reinforce the guess.
Is the futur antérieur common in everyday French?
Yes, especially after quand, dès que and lorsque, and in casual guesses about what happened. It is also frequent in plans, such as dans deux ans, j’aurai fini mes études.