Future Perfect Tense



Definition:-
The comparatively preceding action between the two actions of future is the future perfect tense. There will be two actions in future. An action will occur , then another. The first action of the future is future perfect tense.
If an action is expected to be ended within a certain span of time or point of time in future, it is called future perfect tense.

Structure:-
Subject + shall/will +have + past participle of the verb
1st and 2nd Persons will take shall and the 3rd person will take will.

Assertive Sentence: Positive

Persons
Positive
1st Person
I shall have reached London before 25th December.
We shall have reached London before 25th December.
2nd Person
You shall have reached London before 25th December.
You shall have reached London before 25th December.
3rd Person
He will have reached London before 25th December.
She will have reached London before 25th December.
It will have reached London before 25th December.
They will have reached London before 25th December.

Assertive Sentence: Negative

Persons
Negative
1st Person
I shall not have reached London before 25th December.
We shall not have reached London before 25th December.
2nd Person
You shall not have reached London before 25th December.
You shall not have reached London before 25th December.
3rd Person
He will not have reached London before 25th December.
She will not have reached London before 25th December.
It will not have reached London before 25th December.
They will not have reached London before 25th December.

Interrogative Sentence: Positive

Structure:- Shall/Will + Subject + Have + Verb-3rd

Persons
Positive
1st Person
Shall I have reached London before 25th December?
Shall we have reached London before 25th December?
2nd Person
Shall you have reached London before 25th December?
Shall you have reached London before 25th December?
3rd Person
Will he have reached London before 25th December?
Will she have reached London before 25th December?
Will it have reached London before 25th December?
Will they have reached London before 25th December?

Some Important Rules to Remember:
·        Future perfect tense expresses a completed action before another action in the future.
 Crops will have died unless it rains.
By the time I finish this course, I shall have taken 3 tests.
She will have learnt enough English before she moves to London.

Non-continuous verb in future perfect tense , is used to show a continuous action until another action in the future.
Kerry will have been in Paris for 1year by the time he leaves.  
By Monday, Kerry is going to have had Julie’s book for a week.

·        Like all future tenses , the future perfect tense cannot be used in clauses starting with time linkers like after, as soon as, before, by the time, unless, when, while etc.
While I will have done my homework, Steve will have solved sums. XXXX Incorrect

While I will have done my homework, Steve has solved sums.

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