Future Perfect Continuous Tense

Future Perfect Continuous tense

Future Perfect Continuous tense is used to express situations that will last for a specified period of time at a definite moment in the future. We also use this tense to express certainty about the cause of some future situation.

Structure of Future Perfect Continuous Tense

Positive: Subject + will have been + Verb-ing
Negative: Subject + will not have been + Verb-ing
Question: Will + Subject + have been + Verb-ing

  • You will have been waiting for more than two hours when her plane finally arrives.
  • Will you have been waiting for more than two hours when her plane finally arrives?
  • You will not have been waiting for more than two hours when her plane finally arrives.

More examples:

  • They will have been eating for over 15 minutes by the time Mary arrives.
  • Thomas will have been studying at the university for more than a year by the time he leaves for Asia.
  • How long will you have been studying when you graduate?
  • A: When you finish your English course, will you have been living in New Zealand for over a year?        
    B: No, I will not have been living here that long.

How to Use

1. Duration of an action: Future Perfect Continuous is used to express situations that will last for a specified period of time at a definite moment in the future. It is important that we expect these situations to last longer.

  • Before they come, we will have been cleaning the house for 5 hours.
  • By the next year, Ben and his wife will have been living together for 50 years.

2. Cause of an action: We also use this tense when they want to express certainty about the cause of some future situation.

  • By this time, he will have been working for 12 hours, so he will be very tired.
  • We will be making a rest stop in half an hour, because you will have been driving the car for 6 hours by then.

Using questions beginning with “how long” are more common with Future Perfect Continuous.

  • How long will you have been learning German this year?
  • How long will you have been trying to get your driving license this week? I hope you’ll finally make it!

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