Select the correct active form of the given sentence.

The breakfast will have been finished by nine.

They will have finished the breakfast by nine.

The correct active form of the sentence "The breakfast will have been finished by nine" is:

They will have finished the breakfast by nine.

Here's the breakdown:

• Original sentence (Passive voice): The breakfast will have been finished by nine.
• Active voice: We need to move the object ("breakfast") to become the subject and adjust the verb tense accordingly.
• Future Perfect tense (Passive): "will have been" + past participle ("finished")
• Future Perfect tense (Active): "They" (subject) + "will have" + past participle ("finished") + object ("the breakfast")

Therefore, the active form maintains the future perfect tense indicating the action of finishing the breakfast will be completed before a specific time in the future (nine).