Answer:
The future perfect indicates an action that will have been completed before another action takes place.
Step-by-step explanation:
The future perfect indicates actions that will have been completed before another action in the future takes place. It is formed by the auxiliaries “will have” + the past particle form of a verb. Here are some examples of how to use it:
Kate will have left to work tomorrow by the time her daughter wakes up.
If you keep on postponing your trip, I will have prepared all the wedding details before you get here.
Two days from now, we will have done the 1000-piece puzzle.