Is 격식체 "more polite" than 해요체? Not at all! They are not higher or lower in politeness. They belong to completely different settings:
- 격식체 (Formal Register): Used in public, official, impersonal settings — TV news, presentations, job interviews, the military, airport and subway announcements, and business meetings. - 해요체 (Informal Polite): Used in daily, personal settings — talking with coworkers, restaurant staff, friends, and casual polite chats.
How to Conjugate -ㅂ/습니다 (Statements) & -ㅂ/습니까? (Questions)
The rule is completely determined by whether the stem ends in a vowel or a consonant (batchim):