1) Use
❖ We use the future perfect:
- For actions that will be completed at a specific time in the future.
Example:
By this time next week, he will have finished his report.
- For actions that will be completed before others in the future.
Example:
When you arrive, I will have cooked dinner.
2) How to form the future perfect
We form the future perfect with 'will have' + the past participle of the verb.
Will have + Past participle of the verb
Example:
She will have finished work by four o’clock.
| Past participles of some verbs | ||
|---|---|---|
| Infinitive | Past participle of the verb | |
| To work | Worked | |
| To watch | Watched | |
| To see | Seen | |
| To be | Been | |
3) How to form a negative sentence in the future perfect
We add 'not' after 'will' to form a negative sentence in the future perfect.
Will + not + have + Past participle of the verb
Example:
(+) She will have finished work by four o’clock.
(-) She will not have finished work by four o’clock.
4) How to form a question in the future perfect
We move 'will' to the beginning of the sentence to form a question in the future perfect.
Will + Subject + have + Past participle of the verb
Example:
(+) She will have finished work by four o’clock.
(?) Will she have finished work by four o’clock?
Yes, she will / No, she will not.