Usage:- Future perfect continuous is used to express a contin | تعلم الانجليزية Learn English

Usage:-

Future perfect continuous is used to express a continued or ongoing action that will commence at a fix time or in future and will continue for sometime in future.
يستخدم زمن المستقبل التام المستمر للتعبير عن استمرارية حدوث حدث ما لفترة معينه في المستقبل

1- ☆ Duration Before Something in the Future ☆
استمرارية حدوث شيء في المستقبل

We use the Future Perfect Continuous to show that something will continue up until a particular event or time in the future. "For five minutes," "for two weeks," and "since Friday" are all durations which can be used with the Future Perfect Continuous. 

Examples:-
1- By December, I will have been walking to work each week for a year
2- The day before his retirement he will have been working for 20 years.


2- ☆ Cause of future results ☆
سبب / تأثير حدوث شيء في المستقبل
We can also use the future perfect continuous to indicate that the continuous action that
finishes in the future will be the cause of something in the future.

Examples:-
1- I bet he’ll be hungry because he will have been studying straight through lunch.
2- I’m not going to have any energy for the kids because I’ll have been working so hard this
week.