Futur Antérieur Continu : Le Temps de la Durée
duration, ongoing et future point pour t'en souvenir.
Grammar Rule in 30 Seconds
Use this tense to emphasize how long an action will have been happening by a specific point in the future.
- Use 'will have been' + '-ing' for all subjects. Example: 'I will have been waiting.'
- Always include a time reference like 'by next week' or 'for three hours'.
- Avoid using stative verbs like 'know' or 'believe' in this continuous form.
Overview
Future Perfect Continuous (parfois appelé *Future Perfect Progressive*) est souvent perçu par nous, francophones, comme le sommet de la pyramide des temps anglais. Pourquoi ? Parce qu'il combine quatre éléments linguistiques en une seule structure : le futur (will), le parfait (have), l'aspect continu (been) et l'action elle-même (-ing).will have been -ing, permet de mettre l'accent sur l'effort, la continuité et la progression. C'est le temps de l'endurance. Que tu parles de ta carrière au bureau, de tes entraînements sportifs ou de tes projets de vie, ce temps te permet d'exprimer la profondeur temporelle d'une activité.- 1
will(L'ancrage futur) : C'est ta balise temporelle. Elle indique que toute l'action se situe dans une perspective future. C'est le point d'arrivée de ta réflexion. - 2
have(L'aspect Perfect/Bilan) : En anglais, lePerfectsert à faire un pont entre deux moments. Ici, il relie le début de l'action (qui peut être dans le passé, le présent ou le futur) et ton point d'ancrage futur. C'est ce qui permet de dire « jusqu'à ce moment-là ». - 3
been(L'aspect Continuous/Progressif) : C'est le participe passé debe. Il introduit l'idée que l'action n'est pas ponctuelle. Elle a une épaisseur, une durée. - 4Le verbe en
-ing(L'action) : C'est le cœur de l'activité. La forme en-ingconfirme que nous nous intéressons au processus et non au résultat final.
I will live) décrit une intention ou un fait futur, mais il ne possède pas la structure nécessaire pour « porter » le poids de dix années d'expérience.Future Perfect Continuous intervient : I will have been living here for ten years. On crée un véritable tunnel temporel qui s'étire jusqu'à ce fameux mois de décembre.-ing) | Complément de temps |I / You / He | will | have | been | working | for 8 hours. |We / They | will | have | been | traveling | since Tuesday. |will + have + been + Verbe-ing.By next month, she will have been working at the agency for five years.(Le mois prochain, cela fera cinq ans qu'elle travaille à l'agence.)
will.I'll have been.../You'll have been.../They'll have been...- Attention : on ne contracte jamais le
havedans cette structure spécifique (ne dis pasI'll've been, c'est trop lourd, même pour les natifs !).
not juste après le premier auxiliaire (will).will not (won't) + have + been + Verbe-ing.By the time the train arrives, we won't have been waiting for very long.(Quand le train arrivera, cela ne fera pas très longtemps que nous attendons.)
Will + Sujet + have + been + Verbe-ing ?Will you have been living in London for long when you finish your studies?(Est-ce que cela fera longtemps que tu habites à Londres quand tu finiras tes études ?)
for... (pendant) ou since... (depuis).In June, I will have been studying English for ten years.
Future Perfect Continuous pour expliquer pourquoi quelqu'un sera dans un certain état à un moment donné du futur.When you see him at 6 PM, he will be exhausted because he will have been driving all day.
Future Simple, tu perdrais ce lien logique de cause à effet lié à la durée.By the time the boss arrives, the team will have been discussing the project for hours, so the atmosphere might be tense.
-ing) car ils décrivent un état, pas une action. Ce sont des verbes comme know, believe, understand, belong, own, be, love.- Faux :
By next year, I will have been knowing him for a decade. - Juste :
By next year, I will have known him for a decade.
-ing.- Faux :
By tonight, I will have been writing this report.(Cela suggère que tu seras encore en train de l'écrire, sans forcément l'avoir fini). - Juste :
By tonight, I will have written this report.(Le rapport est fini, c'est le résultat qui compte).
I will have been writing for five hours.will + have + been + -ing), il est tentant d'en oublier un en route. Souvent, les élèves oublient le been.- Faux :
I will have working... - Juste :
I will have been working...
will hashe/she/it, on a envie de mettre has.- Faux :
He will has been... - Juste :
He will have been...
will, le verbe qui suit est toujours à la base verbale (l'infinitif sans to). Donc, c'est toujours have, sans exception.will be -ing | Une action sera simplement en cours à ce moment-là. | At 6 PM, I will be working. (Je serai au bureau.) |will have + part. passé | Une action sera terminée, c'est un résultat. | By 6 PM, I will have finished my work. (J'aurai fini.) |will have been -ing | On mesure la durée de l'action jusqu'à ce moment. | By 6 PM, I will have been working for 9 hours. (Ça fera 9h que je bosse.) |- Si tu réponds à la question « Quoi ? » (résultat) → Simple.
- Si tu réponds à la question « Combien de temps ? » (durée) → Continuous.
In two days, I'll have been traveling for a month! pour montrer que tu commences à être fatigué ou que c'est une sacrée aventure.going to à la place de will ?I am going to have been working.... Mais honnêtement ? C'est une horreur à prononcer et même les natifs l'évitent. Reste sur will, c'est plus élégant et beaucoup plus naturel dans ce contexte de projection future.for et since avec ce temps ?Present Perfect.for+ une durée (ex:for three hours,for ages).since+ un point de départ précis (ex:since Monday,since I started this job).
Future Perfect Continuous fonctionne parfaitement pour relier ce point au futur.By the time we launch the product, the developers will have been testing the software for six months. Cela justifie la qualité du produit et le sérieux du travail accompli.Conjugation of 'To Work' in Future Perfect Continuous
| Subject | Auxiliary | Perfect/Continuous | Main Verb (-ing) |
|---|---|---|---|
|
I
|
will
|
have been
|
working
|
|
You
|
will
|
have been
|
working
|
|
He/She/It
|
will
|
have been
|
working
|
|
We
|
will
|
have been
|
working
|
|
They
|
will
|
have been
|
working
|
Contractions and Short Forms
| Full Form | Contraction | Negative Contraction |
|---|---|---|
|
I will have been
|
I'll have been
|
I won't have been
|
|
You will have been
|
You'll have been
|
You won't have been
|
|
He will have been
|
He'll have been
|
He won't have been
|
|
We will have been
|
We'll have been
|
We won't have been
|
|
They will have been
|
They'll have been
|
They won't have been
|
Meanings
The Future Perfect Continuous describes an ongoing action that will continue up until a specific point in the future, focusing specifically on the duration or the process of that action.
Duration up to a future point
To show how long an activity has been in progress when a future deadline is reached.
“By the time the sun sets, we will have been hiking for eight hours straight.”
“In December, she will have been working at this firm for two decades.”
Cause of a future result
To explain the reason for a future state or feeling based on a continuous action.
“I'll be exhausted when I see you because I will have been traveling for 24 hours.”
“Their eyes will be tired because they will have been staring at screens all day.”
Projected certainty of duration
Expressing a strong conviction about the length of an ongoing future state.
“By then, they will have been dating long enough to get married.”
“I will have been practicing this piece so much that I'll know it by heart.”
Reference Table
| Type | Structure | Objectif | Exemple |
|---|---|---|---|
|
Affirmatif
|
will have been + Verbe-ing
|
Souligner la durée
|
I will have been working.
|
|
Négatif
|
will NOT have been + Verbe-ing
|
Nier la durée
|
She will not have been sleeping.
|
|
Question
|
Will + Sujet + have been + Verbe-ing?
|
Interroger sur la durée
|
Will they have been waiting long?
|
|
Réponse courte (+)
|
Yes, Sujet + will.
|
Affirmation
|
Yes, I will.
|
|
Réponse courte (-)
|
No, Sujet + will not.
|
Négation
|
No, we will not.
|
|
Contraction
|
Sujet + 'll have been + Verbe-ing
|
Style informel
|
He'll have been cooking.
|
Spectre de formalité
By the conclusion of this fiscal year, Mr. Smith will have been serving as Director for a decade. (Professional milestone)
By the end of the year, he will have been working as the Director for ten years. (Professional milestone)
He'll have been the boss for ten years by Christmas. (Professional milestone)
He's gonna have been running the show for ten years straight soon. (Professional milestone)
Future Perfect Continuous : Le temps du voyage temporel
Formation
- Sujet + who/what
- will future
- have been perfect continuous
- Verb-ing action
Idée Clé
- Durée how long
- Action en cours not finished
- Point futur by a specific time
Mots Signaux
- D'ici là future deadline
- Pendant (durée) period of time
- Depuis (temps) starting point
Temps du futur : Comparaison rapide
Choisir ton temps du futur
L'action se passe-t-elle dans le futur ?
L'action sera-t-elle finie à un moment futur ?
Insistes-tu sur la *durée* de l'action jusqu'à ce point ?
L'action sera-t-elle en cours à un moment précis sans focus sur la durée ?
Le Future Perfect Continuous en contexte
Académique
- • Rapports de recherche
- • Dates limites de thèse
- • Plans d'études
- • Jalons de projet
Professionnel
- • Gestion de projet
- • Évaluations de performance
- • Mises à jour clients
- • Planning de formation
Social
- • Plans de voyage
- • Préparatifs d'événements
- • Amitiés de longue date
- • Objectifs personnels
Digital
- • Marathons de séries
- • Sessions de gaming
- • Cycles de dev d'applis
- • Séries de création de contenu
Exemples par niveau
I will have been here for one hour.
I will have been here for one hour.
She will have been sleeping for a long time.
She will have been sleeping for a long time.
We will have been playing for ten minutes.
We will have been playing for ten minutes.
Will you have been waiting long?
Will you have been waiting long?
By 6 PM, I will have been working for eight hours.
By 6 PM, I will have been working for eight hours.
They will have been living here for a month soon.
They will have been living here for a month soon.
He won't have been studying for very long.
He won't have been studying for very long.
How long will she have been cooking by then?
How long will she have been cooking by then?
By the time the train arrives, we will have been standing here for forty minutes.
By the time the train arrives, we will have been standing here for forty minutes.
Next year, they will have been traveling around the world for six months.
Next year, they will have been traveling around the world for six months.
I will have been practicing the piano all day, so I'll be tired.
I will have been practicing the piano all day, so I'll be tired.
Will you have been staying at the hotel for a week by Friday?
Will you have been staying at the hotel for a week by Friday?
By the end of this semester, I will have been researching this topic for over a year.
By the end of this semester, I will have been researching this topic for over a year.
She will have been competing professionally for a decade by the time she retires.
She will have been competing professionally for a decade by the time she retires.
They won't have been dating long enough to make such a big decision.
They won't have been dating long enough to make such a big decision.
By tomorrow morning, it will have been snowing for twenty-four hours straight.
By tomorrow morning, it will have been snowing for twenty-four hours straight.
By the time the legislation passes, the committee will have been debating its merits for years.
By the time the legislation passes, the committee will have been debating its merits for years.
I'll be quite relieved when the project ends, as I will have been working under immense pressure.
I'll be quite relieved when the project ends, as I will have been working under immense pressure.
Will the scientists have been monitoring the volcano long enough to predict the eruption?
Will the scientists have been monitoring the volcano long enough to predict the eruption?
By the gala, the dancers will have been rehearsing this specific choreography for months.
By the gala, the dancers will have been rehearsing this specific choreography for months.
Upon his inauguration, he will have been campaigning tirelessly for the better part of two years.
Upon his inauguration, he will have been campaigning tirelessly for the better part of two years.
The ecosystem will have been recovering from the spill for decades before it reaches its former state.
The ecosystem will have been recovering from the spill for decades before it reaches its former state.
By the time the sun burns out, it will have been fusing hydrogen for billions of years.
By the time the sun burns out, it will have been fusing hydrogen for billions of years.
One wonders if they will have been cohabiting in such disharmony for long before they part ways.
One wonders if they will have been cohabiting in such disharmony for long before they part ways.
Facile à confondre
Both tenses use 'will' and '-ing'. Learners often use Future Continuous when they should be measuring duration.
Learners struggle to choose between the result (Simple) and the process (Continuous).
The structures are similar (have been -ing).
Erreurs courantes
I will have working.
I will have been working.
I will been working.
I will have been working.
I will have been work.
I will have been working.
By tomorrow I will have been here.
By tomorrow I will have been staying here.
I will have been knowing him.
I will have known him.
Will you have been work?
Will you have been working?
I won't have been wait long.
I won't have been waiting long.
By the time he comes, I will be working for 2 hours.
By the time he comes, I will have been working for 2 hours.
I will have been being tired.
I will have been tired.
How long will you have been having this car?
How long will you have had this car?
By next year, the house will have been being built.
By next year, the house will have been under construction.
Structures de phrases
By the time ___, I will have been ___ for ___.
In [Month/Year], she will have been ___ at ___ for ___.
Real World Usage
By next month, I will have been working in this industry for five years.
On Saturday, we will have been dating for exactly two years!
By the time we launch, the developers will have been coding for six months.
By the time we reach Tokyo, we will have been traveling for 15 hours.
The subjects will have been receiving the treatment for three weeks before the first evaluation.
By tomorrow, it will have been raining for three days straight.
Repère les marqueurs temporels
by the time, for ou since sont tes meilleurs indices pour savoir si tu dois utiliser ce temps. C'est ce qui définit le point de vue futur. By the time you arrive, I will have been cooking for ages.
Évite les verbes d'état
will have been -ing. I will have been knowing him for yearsest incorrect.
La durée avant tout
will have done). I will have been writing for two hours.
L'élégance du langage
By next July, I will have been managing this team for a decade.
Smart Tips
Use the Future Perfect Continuous to describe your upcoming milestones.
Use this tense to emphasize the exhaustion of travel.
Immediately check if you need 'will have been -ing'.
Switch to Future Perfect Simple immediately.
Prononciation
The 'will have' contraction
In natural speech, 'will have' is almost always contracted to 'll have' or even 'll've'.
The weak 'been'
The word 'been' is usually unstressed and pronounced with a short /ɪ/ sound, like 'bin'.
Emphasis on duration
I will have been waiting for FIVE hours!
The speaker is emphasizing the length of time to show frustration or effort.
Mémorise-le
Moyen mnémotechnique
W.H.B.I. - 'Will Have Been -Ing'. Think: 'Will He Be Interesting?' to remember the order of the auxiliary verbs.
Association visuelle
Imagine a long, glowing bridge stretching from today into next year. At the end of the bridge is a clock. The bridge represents the 'duration' (have been -ing) and the clock is the 'future point' (will).
Rhyme
By the time the clock strikes ten, I will have been working since who knows when!
Story
A marathon runner is approaching the finish line. As they run, they think: 'By the time I cross that line, I will have been running for four hours.' The line is the future point, and the sweat is the continuous effort.
Word Web
Défi
Write down one thing you will have been doing for a long time by the end of this year. Use the full structure: 'By December 31st, I will have been...'
Notes culturelles
British speakers may use 'shall' instead of 'will' in very formal contexts, though 'shall have been' is becoming extremely rare.
Americans often simplify this tense in casual conversation, opting for the Future Continuous if the duration is already clear from the context.
This tense is frequently used in performance reviews and project planning to emphasize commitment and long-term involvement.
The English future perfect continuous developed as the language moved from a synthetic structure (using endings) to an analytic structure (using auxiliary verbs).
Amorces de conversation
By the end of this year, how long will you have been studying English?
If you stay in your current job for another five years, how long will you have been working there in total?
By the time you retire, what is one hobby you will have been doing for most of your life?
Imagine you are on a 20-hour flight. By the 15th hour, how will you be feeling and what will you have been doing?
Sujets d'écriture
Erreurs courantes
Test Yourself
By next year, I ___ (learn) English for five years.
Find and fix the mistake:
By the time he retires, he will been teaching for thirty years.
Choisis la bonne option :
Traduis en anglais : 'D'ici lundi, cela fera une semaine que je lis ce livre.'
Answer starts with: ["B...
Score: /4
Exercices pratiques
8 exercisesBy the time the guest arrives, I ___ (cook) for three hours.
Find and fix the mistake:
By next week, she will has been living here for a month.
I'm so tired! By the time I get home, I ___ for ten hours.
I am studying English. (By 2026 / for five years)
By next year, I will have been knowing her for a decade.
A: Will you be tired when you arrive? B: Yes, I ___ for two days.
1. By midnight... / 2. By next year... / 3. By the time he arrives...
Score: /8
Practice Bank
12 exercisesBy midnight, the band ___ (perform) for five hours straight.
When we meet, I will have waited for over twenty minutes.
Quelle phrase est grammaticalement correcte ?
Traduis : 'D'ici la fin des travaux, ils auront construit l'immeuble pendant trois ans.'
Remets les mots dans l'ordre :
Associe les sujets à la bonne forme :
If you don't call soon, I ___ (worry) about you for hours by now.
By Tuesday, we will have been travel for a week.
Choisis la meilleure option :
Traduis : 'L'année prochaine, cela fera dix ans qu'elle travaille comme infirmière.'
Remets les mots dans l'ordre :
By the time the festival ends, I ___ (dance) for almost twelve hours!
Score: /12
FAQ (8)
No, it is quite rare. Most native speakers will use the Future Continuous or Future Perfect Simple unless they specifically want to emphasize the duration of an action.
Yes, but only with 'I' and 'we', and it sounds extremely formal or old-fashioned. 'I shall have been working' is grammatically correct but rarely heard.
We use `by` to indicate the deadline or the point in time we are looking back from. We use `until` to show when the action stops. Example: 'By 5:00, I will have been working until I can't see straight.'
Yes, but remember that after 'when', we use the present tense to refer to the future. Example: 'When you arrive, I will have been waiting for an hour.'
Because 'know' is a stative verb. Stative verbs describe states, not actions, and English grammar generally forbids using them in any continuous (-ing) tense.
Technically, yes: 'will have been being + past participle'. However, it is so awkward that native speakers almost never use it. Instead of 'The car will have been being repaired for a week', we say 'The car will have been in the shop for a week'.
You can say 'Won't you have been working?' or 'Will you not have been working?'. The first is much more common in spoken English.
Almost always. Without a time expression like 'for two hours' or 'since morning', the tense loses its primary purpose of showing duration.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Futuro perfecto + gerundio
English always uses 'will have been', while Spanish has alternative verbs for duration.
Futur antérieur + en train de
French avoids the continuous aspect in the future perfect.
Futur II
German lacks a specific continuous form for the future perfect.
~te iru koto ni naru
Japanese focuses on the state/result rather than the auxiliary string 'will have been'.
sa + yakun + qad + kuntu
Arabic uses aspectual particles rather than a single continuous verb form.
yijing ... le
Chinese relies entirely on context and time adverbs.
Learning Path
Prerequisites
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