FUTURE PERFECT CONTINUOUS TENSES

Basic form

 Subject + WILL HAVE BEEN + Verb (past participle form)

Quick examples

• By the next year, I will have been working as a teacher for 30 years.
• We will be making a rest stop in half an hour, because you will have been driving the car for 6 hours by then.

We use the Future Perfect Continuous tense 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.

USES

1. Duration at a definite moment in the future
2. Cause of a future situation

USE 1: Duration

We use this tense 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.

Common Time Expressions: Time expressions that are commonly used with the Future Perfect Continuous:

• By tomorrow / 8 o'clock
• This year / month / week
• Next year / month / week

USE 2: Cause

English speakers 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.