Which verb tense expresses action that will begin in the future and be completed by a specific future time?

The Future Perfect Tense is used to indicate that an action will be completed by a certain point in the future. This tense helps in conveying a sense of time, emphasizing that the completion of the action is not just expected to occur in the future but will have been completed before another specific future time or event takes place. For example, in the sentence "By next year, I will have finished my degree," the action of finishing the degree is expected to be completed before the time reference of "next year." This construction is important for projecting timelines and illustrating how different events relate to one another in future scenarios.

In contrast, other tenses such as Present Perfect Tense describe actions that have already been completed at some unspecified time before now, the Past Perfect Tense refers to actions that were completed before another action in the past, and the Future Progressive Tense describes actions that will be ongoing at a specific future time, but does not indicate completion by that time.