Questions & Answers about Bitte kommen Sie in fünfzig Minuten zurück.
Because Sie with a capital S is the formal word for you in German.
- Sie = formal you
- sie = she or they
So the capital letter is important. In this sentence, the speaker is addressing someone politely or professionally.
Yes. This is a polite command/request, also called the formal imperative.
German uses different imperative forms depending on who you are talking to:
- Komm zurück! = to one person you know well
- Kommt zurück! = to several people you know well
- Kommen Sie zurück! = formal singular or formal plural
So kommen Sie is the correct form when speaking politely.