(스)ㅂ니까

Polite question

Structure
Vowel-final: 가다 → 가 + ㅂ니까? → 갑니까? (does (someone) go?)
Consonant-final: 먹다 → 먹 + 습니까? → 먹습니까? (does (someone) eat?)
ㄹ-final: 살다 → 살 − ㄹ + ㅂ니까? → 삽니까? (does (someone) live?)
Explanation

Kimchi Reader

Used when the speaker asks the listener politely.

Details

This is the interrogative form of (스)ㅂ니다.