Future Perfect Progressive

The future perfect progressive looks ahead to a future time and shows how long an activity will have been continuing.

Form

Use will have been + -ing.

Statement	Negative	Question
I will have been working.	I will not have been working.	Will you have been working?
She will have been studying.	She will not have been studying.	Will she have been studying?

Duration Up To A Future Time

Use this form when an activity starts before a future point and continues up to that point.

By June, I will have been working here for ten years.

At 5:00, they will have been travelling for twelve hours.

This form focuses on duration and activity, not only completion.

Future Perfect Simple Or Progressive

Form	Focus	Example
future perfect simple	completed amount or result	By Friday, I will have written five reports.
future perfect progressive	duration of activity	By Friday, I will have been writing reports all week.

Common Mistakes

Avoid	Use
I will have working here for ten years.	I will have been working here for ten years.
She will has been studying.	She will have been studying.
By the time he will arrive	By the time he arrives

Practice

1 / 5

By May, I will have been ___ here for two years.

AworkingBworkCworkedDto work

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Summary

Use the future perfect progressive for duration up to a future point: will have been + -ing. It emphasizes the continuing activity and often appears with for, since, by, and by the time.