Introduction:

As in all perfect tenses an action happens before another. The future perfect reflects an action that happens before another action in the future. With the exception of since for etc...

Structure:

subject + will + have + verb (past participle) / will+ subject + have + verb (past participle) / will + subject + not + have + verb (past participle) / won t + subject+ have + verb (past participle)

Examples:

I will have finished.
Will you have finished?
I will not have finished.
Won t I have finished?
Won t I have finished?