Future Perfect Tense is used to express an action that, the speaker assumes, will have been completed or will have occurred in the future. It gives a sense of completion of an action that will occur in the future. In other words, the speaker intends to express certainty about the completion of future actions.

Examples:

• I will have completed my work by the end of this week.
• The patient will have recovered from the illness by next month.
• They will have started a new business within a year.

This tense is also used to express the occurrence of one action in the future before another action in the future.

Examples:

• They will have left the office before the manager arrives.
• She will have cooked dinner before her guests arrive.
• He will have learnt Chinese before he moves to China.

In these examples, the first part of the sentence is expressed in the Future Perfect Tense, while the second part is generally expressed in the Present Indefinite Tense.

Main verb: 3rd form of verb, e.g., gone, written, seen.
Helping verb: Will have

 Subject + helping verb + main verb + object.
 Subject + will have + 3rd form of verb + object.

Examples:

In negative sentence, the word ‘not’ is added between ‘will’ and ‘have’, forming ‘will not have’.

 Subject + will not have + 3rd form of verb + object.

Examples:

Note: The short form of 'will not' is 'won't'. Therefore, the negative sentences can also be written with 'won't have' instead of 'will not have'. See the following example:

He will not have received the letter.
He won't have received the letter.

The question sentence starts with ‘will’ and the word ‘have’ comes after the subject inside the sentence.

 Will + subject + have + 3rd form of verb + object.

Examples: