The Future Perfect Tense is used to describe actions that will be completed before a specific point in the future. It is formed using the auxiliary verb "will have" followed by the past participle of the main verb. For example, in the sentence "By next year, I will have graduated," the action of graduating is expected to be completed before the specified time. This tense helps to indicate a sense of completion and is often used with time expressions like "by," "by the time," or "before." It allows speakers to express future expectations clearly, such as in the sentence, "She will have finished her project by Friday."