Form
The future perfect continuous is composed of two elements
the future perfect of the verb "to be" (will have been) + the present participle of the main verb (base + ing)
| Subject | + will have been | + present participle |
|---|---|---|
| He | will have been | playing. |
| I | will have been | playing. |
To live, future perfect continuous tense
| Affirmative | Negative | Interrogative | Negative interrogative |
|---|---|---|---|
| I will have been living | I won't have been living | Will I have been living? | Won't I have been living? |
| You will have been living | You won't have been living | Will you have been living? | Won't you have been living? |
| He will have been living | He won't have been living | Will he have been living? | Won't he have been living? |
| We will have been living | We won't have been living | Will we have been living? | Won't we have been living? |
| They will have been living | They won't have been living | Will they have been living? | Won't they have been living? |
Function
Like the future perfect simple, this form is used to project ourselves forward in time and to look back. It refers to events or actions that are currently unfinished but will be finished at some future time. It is most often used with a time expression.
Examples
- I will have been waiting here for three hours by six o'clock.
- By 2001 I will have been living in London for sixteen years.
- When I finish this course, I will have been learning English for twenty years.
- Next year I will have been working here for four years.
- When I come at 6:00, will you have been practicing long?