Yap, like all of you known early. There is grammatical in Germany that called Future.
Nah, actually German has two kind of future tense itself.
Future 1 is all about what will we do in the future
Future 2 is more like a opinion, assumption, what will (maybe or kinda) happen in the future, because of some reason or because of something happen now
Future 2 is something you want to finish in the future or past
To make it clear, as always, I will give you the examples :
Formula :
Subject + werden + Partizip II + Infinitiv (haben/sein)
1. Future II in the Future (Future II in Zukunft)
Wenn du nach Hause kommen wirst, werde ich schon etwas gegessen haben
If you already came to home, I am sure I will already eat (probably)
2. Future II in the Past (Future II in Vergangenheit)
A : Wo ist die Tafel Schokolade?
B : Keine Ahnung! Thomas wird die Schokolade wohl gegessen haben
3. Future II in the Past (Future II in Vergangenheit) and use to be
A : Warum war Karin nicht auf meiner Party?
B : Sie wird vermutlich krank gewesen sein
Das war alles von mir
Dank u!