What is the future perfect continuous tense? Provide examples of how it is used.

The future perfect continuous tense is a verb tense that is used to describe an ongoing action that will be completed in the future before a specific time or event. It is formed by using the future auxiliary verb "will have been" followed by the present participle form of the main verb (-ing form).

Examples of how the future perfect continuous tense is used:

1. By next year, I will have been studying French for five years.
In this example, the action of studying French started in the past and will continue until next year. The future perfect continuous tense is used to express the duration of the action up to a specific point in the future.

2. They will have been living in London for ten years by the time they move to New York.
Here, the ongoing action of living in London started in the past and will continue until they move to New York. The future perfect continuous tense is used to indicate the duration of their stay in London.

3. By the end of the month, she will have been working on this project for six months.
In this sentence, the action of working on the project started in the past and will continue until the end of the month. The future perfect continuous tense is used to express the duration of her work on the project.

4. By the time he arrives, we will have been waiting for two hours.
Here, the ongoing action of waiting started in the past and will continue until he arrives. The future perfect continuous tense is used to indicate the duration of the waiting period.

5. In five years, they will have been traveling around the world for a decade.
In this example, the action of traveling around the world started in the past and will continue until five years from now. The future perfect continuous tense is used to express the duration of their travels.

Overall, the future perfect continuous tense is used to describe ongoing actions that will be completed in the future before a specific time or event. It emphasizes the duration of the action and its continuity up to a certain point in time.