Grammar
-(으)ㄴ가요? / -나요?
soft question
Form
Verb + -나요?; adjective + -(으)ㄴ가요? (with common variants) — a soft “is / do …?” question.
Function
Asks gently for information or confirmation. The predicate type affects the ending.
Why this form?
-아/어요? — ordinary polite “is / do …?” question, without the specifically softened interrogative ending.
Forms not to confuse
-아/어요?
이게 맞아요? — Is this correct?
Examples
맞나요? — Is that right?
지금 출발하나요? — Are you leaving now?