Future Perfect: With FOR

Choose between the Future Perfect with for (to express how long something will have lasted by a future point) and the Present Perfect with for (to express how long something has lasted up to now). Read the time reference carefully.

• 1
  By next June, I — select —will have workedhave worked here for ten years.
• 2
  She — select —will have livedhas lived in London for twenty years — she moved there in 2005.
• 3
  By the time they graduate, the students — select —will have studiedhave studied the language for four years.
• 4
  He — select —will have beenhas been married for thirty years next March — it's their pearl anniversary.
• 5
  I — select —will have knownhave known her for fifteen years — we met when we were students and we're still close.
• 6
  By the end of this contract, they — select —will have beenhave been partners for over two decades.
• 7
  She — select —will have ownedhas owned this house for fifty years by the time she sells it next fall.
• 8
  We — select —will have waitedhave waited for two hours already — where is he?
• 9
  By the time the project ends next December, the team — select —will have workedhave worked together for three years.
• 10
  He — select —will have playedhas played professional football for fifteen years by the time he retires next season.

Write the correct Future Perfect form of the verb in brackets. Each sentence uses for to express the total duration of an action or state up to a future point in time.

• 1
  By next spring, she (study) the violin for twenty years.
• 2
  By the time they move out, they (live) in this apartment for eight years.
• 3
  How long (you / teach) by the time you retire?
• 4
  By their anniversary next year, they (be) together for forty years.
• 5
  By the end of this academic year, the professor (teach) at this university for thirty-five years.
• 6
  I (not / sleep) properly for a week by the time this project is over.
• 7
  By the time the new manager starts, he (run) this department for five years.
• 8
  By next July, my parents (own) that farmhouse for twenty-five years.
• 9
  She (not / eat) properly for three days by the time she gets out of the hospital.
• 10
  By the time the series finale airs, fans (wait) for two years.

A company director is giving a speech at a milestone celebration. Fill in each gap with the correct tense — Future Perfect with for where a future duration is expressed, Present Perfect where the reference is to now, or another tense where indicated.

Your answers:

Each sentence contains one error — the wrong tense, the wrong auxiliary, or the wrong form of the verb. Write the corrected section.

• 1
  By next June, I will work here for ten years.

  Correct: By next June, I here for ten years.
• 2
  She has lived in Paris for two years by next January.

  Correct: She in Paris for two years by next January.
• 3
  By the time he retires, he will have work here for forty years.

  Correct: By the time he retires, he here for forty years.
• 4
  By their golden anniversary, they will have been marry for fifty years.

  Correct: By their golden anniversary, they for fifty years.
• 5
  How long will you have been teaching since you retire?

  Correct: How long by the time you retire?
• 6
  By next spring, she will studied the violin for twenty years.

  Correct: By next spring, she the violin for twenty years.
• 7
  By the time the series finale airs, fans will have waited since two years.

  Correct: By the time the series finale airs, fans .
• 8
  By next July, my parents will have own that farmhouse for twenty-five years.

  Correct: By next July, my parents that farmhouse for twenty-five years.
• 9
  By the end of this project, I will have not slept properly for a week.

  Correct: By the end of this project, I properly for a week.
• 10
  By the time they move out, they will have been living in this apartment since eight years.

  Correct: By the time they move out, they in this apartment for eight years.

Use the prompts to write a complete Future Perfect sentence with for, expressing how long a situation will have lasted by a future point.

• 1
  By next June / I / work here / for ten years⇒
• 2
  By the time she retires / she / teach / for thirty years⇒
• 3
  By their anniversary / they / be married / for forty years⇒
• 4
  By the time the project ends / we / work together / for two years⇒
• 5
  By next fall / she / own / the house / for fifty years⇒
• 6
  By the time the finale airs / fans / wait / for two years⇒
• 7
  By the time he retires / he / play professionally / for fifteen years⇒
• 8
  By the end of the contract / they / be partners / for over twenty years⇒
• 9
  By next spring / he / run / the department / for five years⇒
• 10
  By the time the students graduate / they / study / the language / for four years⇒