Future Perfect Simple

Future Perfect has two different forms: "will have done" and "be going to have done." Unlike Simple Future forms, Future Perfect forms are usually interchangeable.

1. Future Perfect Simple with "Will"

I. Forms

Positive:        Subject + will + have + past participle +…

Examples:

o    You will only have learned a few words.

o    You will have perfected your English by the time you come back from the U.S.

o    I will have finished my assignment by Monday.

o    They will have finished typing the documents by Sunday.

Negative:      Subject + will + not + have + past participle + …

Examples:

o    You will not have perfected your English by the time you come back from the U.S.

o    I will not have done my homework on Sunday.

o     He will not have arrived before the wedding day.

o    They will not have read book by tomorrow.

Question:      Will + subject + have + past participle + …?

Examples:

o    Will you only have learned a few words?

o    Will you have perfected your English by the time you come back from the U.S.?

o    Will you have come here before the party starts tomorrow?

o    Will they have arrived here before seven in the morning?

II. Future Perfect Simple Active / Passive with “Will”

Receiver action + will + have + been + Past Participle + (by…)

Examples:

·       They will have completed the project before the deadline. Active

·       The project will have been completed before the deadline. Passive

III. Contracted forms

Will     =          ‘ll

Will not =        won’t

2. Future Perfect Simple with "Be Going To"

I. Forms

Positive:        Subject + am/is/are + going to have + past participle +...

Examples:

o    You are only going to have learned a few words.

o    You are going to have perfected your English by the time you come back from the U.S.

o    They are going to have graduated from Cambridge by July 2009.

Negative: Subject + am/is/are + not + going to have + past participle +...

Examples:

o    You are not going to have perfected your English by the time you come back from the U.S.

o    They are not going to have finished their homework by Friday.

o    My uncle isn’t going to have retired by the end of the year.

Question:  Am/is/are + Subject + going to have + past participle +...?

Examples:

o    Are you going to have perfected your English by the time you come back from the U.S.?

o    Are you only going to have learned a few words?

o    Are you going to have bought a new processor by the end of this week?

II. Future Perfect Simple Active / Passive with “Be going to”

Receiver action + am/is/are + going to + have + been + Past Participle + (by…)

Examples:

·       They are going to have completed the project before the deadline. Active

·       The project is going to have been completed before the deadline. Passive

==> NOTE: It is possible to use either "will" or "be going to" to create the Future Perfect with little or no difference in meaning.

III. Uses

Future Perfect Simple is used to express:

    1. Completed action before something in the Future

 

The Future Perfect expresses the idea that something will occur before another action in the future. It can also show that something will happen before a specific time in the future.

Examples:

·       By next November, I will have received my promotion.

·       By the time he gets home, she is going to have cleaned the entire house.

·       I am not going to have finished this test by 3 o'clock.

·       Will she have learned enough Chinese to communicate before she moves to Beijing?

·       Sam is probably going to have completed the proposal by the time he leaves this afternoon.

·       By the time I finish this course, I will have taken ten tests.

·       How many countries are you going to have visited by the time you turn 50?

==> Notice in the examples above that the reference points (marked in italics) are in Simple Present rather than Simple Future. This is because the interruptions are in time clauses, and you cannot use future tenses in time clauses.

    2. Duration before something in the Future (Non-Continuous Verbs)

 

With Non-Continuous Verbs, we use the Future Perfect to show that something will continue up until another action in the future.

Examples:

·       I will have been in London for six months by the time I leave.

·       By Monday, Susan is going to have had my book for a week.

Although the above use of Future Perfect is normally limited to Non-Continuous Verbs and non-continuous uses of Mixed Verbs, the words "live," "work," "teach," and "study" are sometimes used in this way even though they are NOT Non-Continuous Verbs.

==> REMEMBER No Future in Time Clauses

Like all future forms, the Future Perfect cannot be used in clauses beginning with time expressions such as: when, while, before, after, by the time, as soon as, if, unless, etc. Instead of Future Perfect, Present Perfect is used.

Examples:

·       I am going to see a movie when I will have finished my homework. Not Correct

·       I am going to see a movie when I have finished my homework. Correct