Use it to show how long an action will have been in progress by a future time.
The future perfect continuous tense, also called the future perfect progressive, measures how long an activity will have been going on when a future moment arrives. By May I will have been working here for five years counts the duration up to that point. It is formed with will have been plus the -ing form.
It is the least frequent of the twelve tenses, and it is almost always paired with an explicit period of time. Recognising it matters more than producing it: you will meet it in formal writing and in exam reading far more often than you will need it in conversation.
The rarest of the twelve, and the easiest once you see it: a duration added up as far as a future point. The band is still running when it reaches the marker — you are measuring time served, not announcing a finish.
How to form the Future Perfect Continuous
Form
Structure
Affirmative
Subject + will have been + V-ing
Negative
will not have been + V-ing
Question
Will + Subject + have been + V-ing?
Future Perfect Continuous example sentences
AffirmativeBy July I will have been studying for 2 years.
NegativeHe won't have been sleeping for long.
QuestionWill you have been driving for 5 hours by then?
AffirmativeBy noon, we will have been travelling for six hours.
AffirmativeNext month, she will have been leading the team for a year.
AffirmativeBy the time you arrive, I will have been working all day.
NegativeThey won't have been living here for long by June.
QuestionHow long will he have been teaching by then?
AffirmativeIn December, the project will have been running for three years.
Future Perfect Continuous vs Future Perfect
Use the continuous to measure duration up to a future point. Use the simple to show that something will be complete by then.
By gives the future reference point; for gives the length of the activity.
Focus
Future perfect continuous
Future perfect
Duration
By June, I will have been working here for five years.
—
Completion
—
By June, I will have finished the course.
Ongoing process
They will have been travelling all day.
They will have reached Rome by six.
Typical question
How long will you have been studying?
How many units will you have completed?
Common Future Perfect Continuous mistakes
She will has been working for a year.She will have been working for a year.Will is followed by the base form have, never has.
He will have been know her for a decade.He will have known her for a decade.Know is a state verb, so use the future perfect simple.
By Friday, I will have been finished the report.By Friday, I will have finished the report.A completed result needs the future perfect, not the continuous.
Use the rule above. Every answer comes with the reason for it, so a wrong one is worth as much as a right one.
By December I ___ here for ten years.
will have been working
am working
will work
will have worked
Show answer
will have been working — The future perfect continuous measures how long an activity will have been going on at a future point.
At six she ___ for eight hours without a break.
will be drive
will have been driving
will drive
has been driving
Show answer
will have been driving — Will have been plus the -ing form counts the duration up to that future moment.
Which sentence is correct?
By then we have known them for years.
By then we will have been knowing them for years.
By then we will have known them for years.
By then we will knowing them for years.
Show answer
By then we will have known them for years. — Know is a state verb, so it takes the future perfect simple rather than the continuous.
___ they ___ long enough to qualify?
Will ... training
Have ... been training
Will ... be trained
Will ... have been training
Show answer
Will ... have been training — Will comes first, then have been plus the -ing form.
Next month the shop ___ for a century.
will have been trading
will trade
trades
has traded
Show answer
will have been trading — A long period counted up to a future date takes will have been + -ing.
By Friday he ___ for a whole week.
won't be slept
won't have been sleeping
will have been sleep
hasn't been sleeping
Show answer
won't have been sleeping — The negative attaches to will: won't have been sleeping.
By this evening they ___ for twelve hours. (travel)
Show answer
will have been travelling — Will have been plus the -ing form counts a duration up to a future point. British English doubles the l in travelling.
In May she ___ the choir for twenty years. (lead)
Show answer
will have been leading — A long unbroken period measured to a future date takes will have been + -ing.
By the time the kettle boils I ___ for an hour. (wait)
Show answer
will have been waiting — The future point is set by the time clause; the duration runs up to it.
___ long by then? (you / queue)
Show answer
Will you have been queuing — Will comes first in the question, then have been plus the -ing form.
5 short stories in the Future Perfect Continuous
Reading the tense in context is what makes it stick. Every future perfect continuous verb below is highlighted, so you can see the pattern repeating across 605 words of natural English.
Highlighted: future perfect continuous verb
What to look for as you read
The rarest of the twelve, and worth recognising rather than drilling. Each highlighted form combines a future deadline with a stretch of time running up to it — by June she will have been teaching for ten years. Read these five, notice the shape, and do not worry if you never produce it in speech.
The Devoted Employee's Jubilee
By the time the clock strikes midnight on December 31st, Mr. Harrison will have been working at the national bank for exactly forty years. When he attends his official retirement party next week, his colleagues will celebrate his incredible loyalty.
By that date, he will have been managing the main financial accounts since the early days of the company. He won't have been taking long vacations or extended leaves; instead, he will have been dedicating his entire adult life to the growth of the firm.
The board of directors knows that for four decades, Mr. Harrison will have been arriving at the office before everyone else. When he finally closes his office door, he will know that his hard work will have been shaping the careers of hundreds of young bankers.
Future Perfect Continuous forms in this story:will have been workingwill have been managingwon't have been takingwill have been dedicatingwill have been arrivingwill have been shaping
The Non-Stop Flight to Sydney
By the time Captain Rogers finally lands the massive commercial airplane in Sydney tomorrow morning, the passengers will be incredibly exhausted. By the moment the wheels touch the runway, the aircraft will have been flying through the sky for seventeen hours without a single stop.
The experienced flight attendants will have been serving hot meals, fresh coffee, and cold drinks to over three hundred passengers throughout the night. Because of the long distance, the onboard computer systems will have been tracking the precise weather patterns across the Pacific Ocean for hours.
The travellers won't have been walking around much due to the tight space, but they will rejoice knowing that this non-stop route will have been saving them nearly a whole day of travel time.
Future Perfect Continuous forms in this story:will have been flyingwill have been servingwill have been trackingwon't have been walkingwill have been saving
The Master Artisan
By next summer, the world-renowned sculptor, Giovanni, will showcase his ultimate masterpiece in the grand gallery of Rome. By the time the exhibition opens to the public, he will have been carving that single block of white marble for more than three years.
Visitors will admire the intricate details, unaware that Giovanni will have been standing in his dusty studio for ten hours a day, shaping the stone with his small chisel. He won't have been painting or working on other smaller projects during this time because he wanted total focus.
His young apprentices have been observing his flawless technique, knowing that his creative passion will have been inspiring the next generation of Italian artists for decades to come.
Future Perfect Continuous forms in this story:will have been carvingwill have been standingwon't have been paintingwill have been inspiring
The Climate Research Expedition
By the end of this month, the brave international team of scientists in Antarctica will complete their winter research cycle. By next Tuesday, they will have been living in isolated freezing modules under extreme sub-zero temperatures for six months straight.
The researchers will have been collecting deep ice core samples every morning to study prehistoric climate patterns. Because of the severe blizzards, they won't have been exploring the open landscape as much as they planned.
However, their advanced automated sensors will have been recording valuable global atmospheric data without a single interruption. When the rescue ship arrives, the team will know that their cold survival will have been providing crucial answers to save the planet.
Future Perfect Continuous forms in this story:will have been livingwill have been collectingwon't have been exploringwill have been recordingwill have been providing
The Gamer's Marathon
By 8:00 PM tonight, Toby's charity live-stream will finally reach its conclusion. By that exact moment, Toby will have been playing the latest strategy game for twenty-four consecutive hours to raise money for a children's hospital.
Millions of viewers worldwide will have been watching his chaotic screen and interacting with him through the live chat. He won't have been sleeping at all, surviving only on energy drinks and healthy snacks.
His supportive online community will have been donating thousands of dollars every hour of the marathon. When he finally turns off his computer webcam, Toby will smile through his heavy sleepiness, proud that his favourite hobby will have been helping real families in deep need.
Future Perfect Continuous forms in this story:will have been playingwill have been watchingwon't have been sleepingwill have been donatingwill have been helping
The future perfect marks completion — By Friday I'll have written the report means it will be finished. The future perfect continuous measures duration reaching that point — By Friday I'll have been writing it for a month. The continuous form nearly always carries an explicit length of time.
Is this tense actually used?
Yes, though sparingly. It appears most in anniversaries, service records and project timelines, where the length of an ongoing activity matters: Next month she will have been leading the team for two years. In everyday conversation speakers often rephrase it more simply.
Can it be used with state verbs?
No, consistent with every other continuous form. Will have been knowing is wrong; use the future perfect simple instead — By June I will have known her for a decade. State verbs reject the continuous in all twelve tenses.
