Future Perfect Progressive Tense
Future perfect progressive tense displays an activity that will be in progress before another event or time in the future. This tense emphasizes the duration of activity before another event or time in the future. In other words, we use the future perfect continuous tense to show that something will continue up to a particular event or time in the future.
As: He’ll have been studying for three hours by the time he gets home.
Examples:
- They will have been discussing for over an hour by the time we arrive.
- Ali will have been teaching at the university for more than a year by the time he leaves for Asia.
- How long will you have been studying when you graduate from university?
- When you finish your English course, will you have been living in the U.S.A. for two years?
Notice that the later action is expressed in the simple present tense rather
than the simple future tense. This is because the later action is in the time
clause, and future tenses cannot be used in time clauses beginning with time
expressions such as: when, while, before, after, by the time, as soon as, if,
unless, etc. Instead of future perfect progressive, present perfect
progressive is used in the time clause.
Examples:
- He’ll have been studying for three hours by the time he will get home. Not Correct
- He’ll have been studying for three hours by the time he gets home. Correct
- Ali won't get a promotion until he will have been working here as long as Diya. Not Correct
- Ali won't get a promotion until he has been working here as long as Diya. Correct
Future Perfect Continuous Forms
We use the present participle form of the verb. Auxiliaries which we use in this tense are will have been and shall have been. We use ‘shall’ with I and We in British English. To make a negative sentence, we use NOT after will/shall. In questions, we use will/shall at the beginning of the sentence.
Affirmative:
Subject + will/shall + have + been + verb (present participle form)
. . . . . .
- You will have been waiting at the airport for two hours when her plane finally arrives.
- He’ll have been studying for three hours by the time he gets home.
- By the time he gets home, we will have been studying for three hours.
- I shall have been leaving for two hours when he gets up.
Negative:
Subject + will/shall + not + have + been + verb (present
participle form) . . . . . .
- You will not have been waiting at the airport for two hours when her plane finally arrives.
- He won’t have been studying for three hours by the time he gets home.
- By the time he gets home, we will not have been studying for three hours.
- I shall not have been leaving for two hours when he gets up.
Interrogative:
Will/shall + subject + have + been + verb (present participle
form) . . . . . .
- Will you have been waiting at the airport for two hours when her plane finally arrives?
- Will he have been studying for three hours by the time he gets home?
- By the time he gets home, will he have been studying for three hours?
- Shall we have been leaving for two hours when he gets up?
Negative and Interrogative:
Will + not + subject + have + been + verb (present participle
form) . . . . . . (Am Eng)
- Will not you have been waiting at the airport for two hours when her plane finally arrives?
- Won’t he have been studying for three hours by the time he gets home?
- By the time he gets home, won’t we have been studying for three hours?
Will/shall + subject + not + have + been + verb (present
participle form) . . . . . . (Br Eng)
- Will you not have been waiting at the airport for two hours when her plane finally arrives?
- Will he not have been studying for three hours by the time he gets home?
- By the time he gets home, shall we not have been studying for three hours?
- Shall we not have been leaving for two hours when he gets up?
Form Future Perfect Progressive with "Be Going To"
To create the future Perfect progressive tense, we use either
"will" or "be going to" with little difference in meaning.
Future perfect progressive tense can be used in two ways or it has two forms: "will/shall have been + present participle" and "be verb + going to have been + present participle". [am/is/are + going to have been + past participle]
Examples:
- You are going to have been waiting at the airport for two hours when her plane finally arrives.
- Are you going to have been waiting at the airport for two hours when her plane finally arrives?
- You are not going to have been waiting at the airport for two hours when her plane finally arrives.
Yes/No Questions and short Answers
A question that is answered by Yes or No is called a Yes/No
Question.
A short answer means to use just subject and auxiliary after yes
or no to give an answer. A comma is used after Yes or No.
Ex:
- Will you have been discussing this for more than five minutes when we come?
Yes, we will. Or
Yes, we will have.
- Will they have been cooking for more than 10 minutes by the time we come?
No, they won’t. Or
No, they won’t have.
Information Questions (wh questions) and Answers
A question that is asked to interrogate or get information is
called an information question.
Ex:
- What will she have been studying for up to four years when she moves to Germany?
She will have been studying computer programming for up to
four years when she moves to Germany.
- Where will they have been eating for twenty minutes by the time their father gets home?
They will have been eating for twenty minutes in the kitchen
by the time their father gets home.
- Why will she have been waiting for her husband for two hours before she goes to bed?
Because she will have to serve him food before she goes to
bed.
- Who will have been eating for ten minutes by the time we start to eat?
Tom will have been eating for ten minutes by the time we start
to eat.
- Whose clothes will she have been washing for an hour when you get there?
She will have been washing her clothes for an hour when I
get there.
- Which book will you have been studying for many days before the one I suggest?
I will have been studying English Grammar Book for many days
before the one you suggest.
- How will you have been waiting for us since morning when we come?
We will have been waiting patiently since morning when you come.
