What Is “Will Have Been Doing”?
The structure “will have been doing” is the future perfect continuous tense. It describes an action that will continue up until a specific point in the future.
By next July, I will have been working here for ten years.
How to Form It
Structure: will + have + been + [verb]-ing
- Affirmative: She will have been studying for 5 hours by midnight.
- Negative: They won’t have been waiting long when we arrive.
- Question: Will you have been exercising every day this week?
When to Use It
- To emphasize the duration of an activity before a future moment.
- To show cause of a future result (often with visible evidence).
- Common time expressions: by then, by next year, for two hours, since morning.
He’ll be tired because he will have been running for an hour.
Practice Quiz
Which sentence correctly uses the future perfect continuous?