The future perfect continuous tense talks about the length of an action that will be completed at a time in the future.
A future perfect continuous tense sentence has two time expressions. One talking about a time in the future and the second talking about the length of an action.
- Next week, I will have been working here for five years.
(time in the future/next week – length of an action/working here for five years)
The future perfect continuous is formed using will + have been + verb in present participle (-ing)
- At 11 o’clock, I will have been waiting for an hour.
The negative is formed using will + not/won’t + have been + verb in present participle (-ing)
- By next year, he won’t have been studying long enough to pass the exam.
The question is formed using will + subject + have been + verb in present participle (-ing)
- When will they have been playing this game for two hours?
