German phrase
Muss ich in ~?
Meaning
Do I have to be in ___?
When to use it
Asks if you must take part. Common for courses, groups, or other activities.
Example dialogue
Muss ich in den Kurs?
Do I have to be in the course?
Nein, du musst nicht, du kannst auch nur zuhören.
No, you do not have to. You can just listen.