Future perfect progressive tense is a part of Future tense.
What is future perfect progressive tense?
Future perfect progressive tense is also known as future perfect continuous tense. It is a verb form that indicates a continuous action that will be completed at some point in the future.
The future perfect progressive tense consists of certain elements such as will + have + been + the verb’s present participle (verb root + -ing).
In future perfect progressive tense, when we describe an action, we are projecting ourselves forward in time and looking back at the duration of the activity.
However, progressive forms occur only with what are called dynamic verbs and not with stative verbs. The action is assumed to be continued for a specific time in future.
In this verb form, a time reference is used to show the starting point of the sentence or for how long the action continues.
Since and for are the two specific words used in the sentences for ‘time reference’.
Structure of the sentence
Main verb: Present participle( Base or 1st form of the verb+ing) Example: going, leaving, working.
Auxiliary verb: Will have been.
Subject+ Auxiliary verb+ Main verb+ Object+ Time reference.
Subject+ will have been+ Present participle(1st form of the verb+ing)+ Object+ time-reference.
- She will have been reading this book since Friday.
- They will have been writing blogs for three hours.
- The girl will have been sleeping since 11 pm.
- He will have been singing songs for two hours.
Subject+ Auxiliary verb+ Main verb+ Object+ Time-reference.
Subject+ WILL NOT have been+ present participle(1st form of the verb+ ing)+ Object+ time-reference.
- She will not have been dancing for three hours.
- He will not have been using my car anymore.
- He will not have been playing games since November 2016.
- I will not have been waiting for you anymore.
Hence, these are some of the rules and formulas which you can use while framing sentences.