Future Perfect Continuous opisuje czynność trwającą przez pewien czas do określonego momentu w przyszłości.
Podmiot + will have been + czasownik z -ing
Przykłady:
I will have been working here for 5 years by next June.
She will have been studying all night by the time the exam starts.
Will + podmiot + have been + czasownik z -ing?
Will you have been working here for ten years in December?
Will she have been sleeping when we get home?
Podmiot + will not (won’t) have been + czasownik z -ing
He won’t have been waiting long when you arrive.
They won’t have been living there for very long.
for + okres czasu – for two hours, for ten years
by + moment w przyszłości – by 6 o’clock, by next summer
by the time + Present Simple – By the time you arrive, I will have been waiting for an hour.