Dictionary form and the three levels
Remove -다 to get the stem.
formal (-ㅂ니다), polite (-요), plain (casual).
| Level | Ending | Form |
|---|---|---|
| formal polite | -(스)ㅂ니다 | 갑니다 |
| informal polite | -아/어요 | 가요 |
| plain | -ㄴ/는다 | 간다 |
Formal for strangers/business, polite for daily life, plain among close friends.