Negation 안/못 in Korean

Overview

Korean has two primary negation patterns at the CEFR A1 level: 안 (choice-based negation, "don't/won't") and 못 (inability-based negation, "can't"). This distinction does not exist in English and is one of Korean's most elegant grammatical features. Choosing the right negation word conveys not just that something does not happen, but why.

Both negation words are placed directly before the verb in the short form, or can use the long form with -지 않다 and -지 못하다 attached after the stem. The long form is more common in formal writing and when the verb is a 하다 compound.

Additionally, 없다 (not exist / not have) serves as the negative counterpart of 있다, and 아니다 (not be) negates the copula 이다. Together, these patterns cover all types of negation in Korean.

How It Works

Short Form (more common in speech)

Type	Pattern	Example
Choice (won't/don't)	안 + verb	안 가요 (don't go)
Inability (can't)	못 + verb	못 가요 (can't go)

Long Form (more common in formal/written)

Type	Pattern	Example
Choice	stem + 지 않다	가지 않아요 (don't go)
Inability	stem + 지 못하다	가지 못해요 (can't go)

하다 Verb Negation

For 하다 compound verbs, negation goes between the noun and 하다:

Short form	Long form	English
공부 안 해요	공부하지 않아요	don't study
공부 못 해요	공부하지 못해요	can't study

Special Negatives

Positive	Negative	Meaning
있다	없다	not exist / not have
이다	아니다	not be
알다	모르다	not know

Examples in Context

Korean	Romanization	English	Note
안 가요.	an ga-yo	(I) don't/won't go.	choice
못 먹어요.	mot meo-geo-yo	(I) can't eat.	inability
시간이 없어요.	si-ga-ni eop-seo-yo	(I) don't have time.	없다
가지 않아요.	ga-ji a-na-yo	(I) don't go.	long form
학생이 아니에요.	hak-saeng-i a-ni-e-yo	(I) am not a student.	copula negation
공부 안 해요.	gong-bu an hae-yo	(I) don't study.	하다 verb short form
몰라요.	mol-la-yo	(I) don't know.	special negative
못 봤어요.	mot bwa-sseo-yo	(I) couldn't see (it).	past + inability
안 좋아요.	an jo-a-yo	(It's) not good.	negating adjective
아직 안 왔어요.	a-jik an wa-sseo-yo	(He) hasn't come yet.	not yet

Common Mistakes

Using 안 when 못 is needed

• Wrong: 안 먹어요 (when you mean "I can't eat due to allergy")
• Right: 못 먹어요
• Why: 안 implies choice ("I choose not to eat"), while 못 implies inability ("I can't eat"). The distinction matters in Korean.

Putting 안/못 in the wrong position with 하다 verbs

• Wrong: 안 공부해요
• Right: 공부 안 해요 (or 공부하지 않아요)
• Why: For noun + 하다 compounds, 안/못 goes between the noun and 하다 in short form.

Using 안 with 있다/없다

• Wrong: 안 있어요
• Right: 없어요
• Why: 있다 has its own negative form 없다. You do not use 안 with 있다.

Double negation by accident

• Wrong: 안 없어요 (not not-exist)
• Right: 있어요 (exists) or 없어요 (doesn't exist)
• Why: 없다 is already negative. Adding 안 creates an unintended double negation.

Usage Notes

In casual speech, 안 is far more common than the long form -지 않다. However, in formal writing and news reporting, the long form is preferred. 못 carries a stronger emotional tone than 안 — it often implies frustration or regret about the inability. In honorific speech, 못 is sometimes softened with other expressions.

Practice Tips

• For each verb you know, practice both negation types: 안 가요 (won't go) vs. 못 가요 (can't go). Feel the difference in meaning.
• Practice the 하다 verb pattern separately: 운동 안 해요, 공부 못 해요, 요리하지 않아요.
• When listening to Korean, pay attention to whether speakers use 안 or 못, and infer their reason for negation.

Related Concepts

• Prerequisite: Polite Ending -아/어요 — negation attaches to conjugated verbs
• Next steps: Double Negation -지 않을 수 없다 — advanced emphasis through double negation