Future perfect tense

 The future perfect tense is used to express an action that will be completed or finished by a certain point in the future. It is formed by using the auxiliary verb "will" (or "shall") followed by the auxiliary verb "have" and the past participle form of the main verb. The basic structure is as follows:

Subject + will + have + past participle

Here are some examples:

1. "I will have finished my work by the end of the day."
2. "They will have graduated from college by next year."
3. "She will have written the report before the meeting."
4. "We will have completed the project by the deadline."
5. "He will have arrived at the airport by 9 p.m."

In these examples, the future perfect tense is used to indicate that the action will be completed before a specific point in the future. It expresses the idea that the action will have already happened at that time.

The future perfect tense is often used with time expressions that indicate a specific future point, such as by the end of the day, by next year, or before the meeting. It highlights the completion of an action in relation to a future reference point.