How to use Future Perfect for better resolutions making?

The future perfect tense is for talking about an action that will be completed between now and some point in the future. Imagine that your friend Linda asks you to take care of her cat for a few days while she goes on a trip. She wants you to come over today at noon so she can show you where to find the cat food and how to mash it up in the bowl just right so that Fluffy will deign to eat it. But you’re busy this afternoon, so you ask Linda if you can come at eight o’clock tonight instead.

“No, that won’t work! At eight o’clock I will have left already,” she says.

What does the future perfect tell us here? It tells us that Linda is going to leave for her trip some time after right now, but before a certain point in the future (eight o’clock tonight). She probably shouldn’t have waited until the last minute to find a cat sitter.

The Future Perfect Formula

The formula for the future perfect tense is pretty simple: will have + [past participle]. It doesn’t matter if the subject of your sentence is singular or plural. The formula doesn’t change.

Examples

• I will have been here for six months on June 23rd.
• By the time you read this I will have left.
• You will have finished your report by this time next week.
• Won't they have arrived by 5:00?
• Will you have eaten when I pick you up?