English Grammar – Future Perfect Tense

The formula for future perfect tense (Positive) is Subject +Aux + V3

Positive Negative   Interrogative
I shall have written. I shall not have written. Shall I have written?
We shall have written. We shall not have written. Shall we have written?
You will have written. You will not have written. Will you have written?
He will have written. He will not have written. Will he have written?
She will have written. She will not have written. Will she have written?
It will have written. It will not have written. Will it have written?
They will have written. They will not have written. Will they have written?

This Tense is used to express an action which is imagined to have been completed at some point of time in future. It may be noted that this tense is basically theoretical and rarely used. 

Example :

She will have completed her exams by next Monday.( Positive sentence)

He will have not applied for the post.( Negative sentence)

Will they have announced the test result by this weekend? (Interrogative sentence)

Rules and Uses of Future Perfect Tense.

Future perfect tense is used in the following situations.

  1. An action that will happen before another action in the future
  2. An action that will happen before a specific time in the future:
  3. A state usually used to specify up to some time in the future. Not usually used for actions.

1. An action that will happen before another action in the future

Examples :

  • Jay will have completed his home work by the time her mother comes home.
  • The thieves will have left the place by the time cops arrive.
  • By the time flight gets landed her brother will have come to airport to receive her.

2. An action that will happen before a specific time in the future:

Examples :

  • Weather will have changed completely by next month.
  • They will have come back home by seven o’ clock.
  • By the time children wake up, their mother will have prepared lunch for them.

3. A state usually used to specify up to some time in the future. Not usually used for actions.

Examples :

  • In August, we shall have lived here for ten years.
  • Next month, he will have had this bike for five years.
  • Tony will have been unwell for three weeks tomorrow.

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