 To form the Future Perfect Tense we use the future simple of have (will have) and the past participle of the verb. This is also called the past in the future. Most past participles end in -ed (painted, arrived, visited, etc.). Irregular verbs have special past participles that must be memorized. (told, said, spoken, eaten, etc.) The future perfect tense is not commonly used in English.
 The Future Perfect Tense is often used with expressions like by the time, by next week, by then, by next year, by the year 2020, etc.)
 Affirmative form
I
you
he/she/it WILL HAVE FINISHED
we
you
they
 Negative form
I
you
he/she/it WILL NOT HAVE
we FINISHED
you
they
1. She will not have finished her work.
2. He will not have left.
Interrogative form
I
you
WILL he/she/it HAVE FINISHED?
we
they
1. Will they have arrived?
2. Will our children have returned from school?
|
1. I will have accomplished the task by the time my coleague returnes.
2. She will have cooked dinner by the time her husband repears the car.
3. Tina will have washed the dishes.
4. By the time you arrive, my foreign guests will have left.
5. He will have written his report.
6. By the time we get to the cinema the movie will have started.
| to express an action that will be completed in the future (usually before another action or event in the future)
|
Future Perfect Tense
Structure
to say that an action will be completed before a specific time in the future
to express what we thing or guess has probably happened in the recent past
We can also form the Future Perfect Tense with "be going to". "Will" form and "be going to" form can be used interchangably: 
