Future Tenses (Futur I, Futur II)
How do I form Futur II (future perfect)? When is it used?
Conjugated form of werden + Partizip II + haben/sein (infinitive) at the end of the sentence.
Usage: To express an action that will have been completed by a certain point in the future, or an assumption about a past event.
Example
Bis morgen werde ich die Arbeit gemacht haben. (By tomorrow, I will have finished the work.)
Sie wird es wohl vergessen haben. (She probably forgot it - assumption about the past.)