By this time next year we will have been being on this committee
for a decade.
Is it correct to use future perfect progressive tense in this sentence?
Warning: A Capital Community College website is spreading the following false information:
The truth is, you CAN use "to be" in the future perfect progressive, but only IF it is the action verb "to be" which is used when someone is acting like something, and not the state verb "to be" which is the normal use. STATE verbs are never progressive.
e.g.: in the sentence "John is an adult, but John is being a child." the first verb is a STATE verb, the second is an ACTION verb.
The answer to the question is "no" because "to be on a committee" is a STATE.
John is on a committee.
John has been on the committee for 5 days.
On Saturday, John will have been on the committee for 1 week.
ACTION: (John is 30. He is an adult, but he is acting like a child.)
John is being a child.
John has been being a child for 5 days.
On Saturday, John will have been being a child for 1 week.
It would be incorrect to change that last sentence to "John will have been a child for 1 week" as that would be stating that John IS a child.
The sentence is grammatically incorrect. It is better to say:
By this time next year we will have been on this committee for a decade.