Future Perfect Continuous
The Future Perfect Continuous tense is used to describe a continuous action that will be ongoing at a specific time in the future. It’s used with another clause which will include a verb or a prepositional phrase.
To form the Future Perfect Continuous tense, we use the auxiliary verbs will have been followed by the present participle form of the main verb (-ing).
The basic verb form is like this: will + have + been + verb-ing
When to use Future Perfect Continuous Tense
We can use the Future Perfect Continuous tense in 2 similar ways.
To say how long an action continues up to a specific time
We use this tense to express an action that continues for some time before ending in the future.
We use a prepositional phrase for… with this use case. We may also use a time reference clause, and if it has an action, it will be Present Simple tense.
In April, we will have been living in France for five years.
By tomorrow, I will have been waiting a week for you to arrive.
By the time I eat this, I will have been cooking for six hours.
To say a future action will cause another future action
We use this tense to say that a future event will cause another one. We often use the conjunction because for this use case.
She will have been reading her book all day because she has to catch up.
He will have been saving all his wages because he needs a lot for Paris.
They will have been thinking about it all day because it’s really important to them.