Future perfect continuous / positive/negative/interrogative

 

Future perfect progressive tense verbs contain will + have been + verb (ending in -ing). They’re indicating something that will happen in the future. And that “something” will be an ongoing action. For example, “By that time, she will have been working here for two years.

Structure:

Subject    + will have been + Verb - ing    + time reference + object

(Note: The place of time references in these sentences can vary)

She will have been living in  Pakistan for ten years at that point.

If it’s midnight, he will have been sleeping for four hours by then.

We will have been studying at this glorious university for three years.

When our parents get married, I will have been singing professionally for over a year.

By our 40th wedding anniversary, this plant will have been growing for 35 years.

Interrogative:

Will    + subject    + have been    + Verb - ing    + (time reference) object

Will     she                have been     living        in Pakistan for ten years by that time?

Negative:

Subject    + will not have been    + Verb- Ing    + object

She            will not have been     living in Pakistan for ten years at that time. 

Note: In written and in Spoken English Future perfect continuous sentences occupy very less space.