How to Conjugate 쓰다 (to write/use): regular-ㅡ Pattern

ㅡ stems: the ㅡ drops before 아/어. 쓰 → 써요. Two meanings: to write and to use.

The Rule

ㅡ stems: the ㅡ drops before 아/어. 쓰 → 써요. Two meanings: to write and to use. 쓰다 follows the regular-ㅡ irregular pattern. This means the verb stem changes when certain endings are added. Don't worry — once you learn this pattern, it applies to many other verbs too.

Why English Speakers Get It Wrong

English verb conjugation is relatively simple — "I eat, he eats, I ate." Korean is more complex because the verb ending changes based on politeness level, tense, AND the verb stem's final vowel or consonant. The regular-ㅡ pattern is especially tricky because the stem itself changes. English irregular verbs (go→went) change unpredictably, but Korean irregular verbs follow learnable PATTERNS. Once you know the regular-ㅡ rule, you can predict how all regular-ㅡ verbs behave.

How It Works

Stem: 쓰 Polite present (해요체): 써요 Polite past: 썼어요 Polite future: 쓸 거예요 Formal (합쇼체): 씁니다 Negative: 안 써요 Notice how the stem "쓰" changes in some forms. This is the regular-ㅡ pattern in action.

Real Examples

• 써요 (sseoyo) — "write/use (polite present)" • 썼어요 (sseoteoyo) — "write/use (past)" • 쓸 거예요 (sseur geoyeyo) — "will write/use (future)" • 씁니다 (sseupnida) — "write/use (formal)" • 안 써요 (an sseoyo) — "don't write/use"

Common Mistakes

❌ 쓰어요 (sseueoyo) ✅ 써요 (sseoyo) → The ㅡ vowel drops: 쓰 + 어요 → 써요. ❌ Using the casual form (쓰어/아) in formal situations ✅ Use 씁니다 when speaking to elders, at work, or in official settings → Mixing up politeness levels is one of the most noticeable mistakes foreigners make in Korean.

Quick Tip

Start by mastering the 해요체 (polite) form: 써요. This is the form you'll use 90% of the time in daily life. Once it's automatic, add the past (썼어요) and future (쓸 거예요) to your toolkit. For regular-ㅡ verbs, make a list of 5 common ones and practice all their forms. The pattern will click after repetition.

쓰다: 써요 (present) / 썼어요 (past) / 쓸 거예요 (future)

Examples

써요 — sseoyo — write/use (polite)

썼어요 — sseoteoyo — write/use (past)

쓸 거예요 — sseur geoyeyo — will write/use

씁니다 — sseupnida — write/use (formal)

안 써요 — an sseoyo — don't write/use