How to Make Negative Sentences in Korean: 안, 못, 없다, and 아니다 Explained

Korean does not use just one negative form. Depending on the meaning, native speakers use 안, 못, 없다, and 아니다.

This guide shows when to use each one and how to avoid common mistakes.

1. How Negative Sentences Work in Korean

To say “do not,” “cannot,” “do not have,” and “am not,” Korean uses different grammar patterns.

That is why learners often confuse 안, 못, 없다, and 아니다.

Each form has a different meaning and use.

Once you know the difference, choosing the correct form becomes much easier.

2. The Four Main Ways to Make Negative Sentences in Korean

Most Korean negative sentences use one of these four forms.

The Four Main Korean Negative Forms

Meaning	Form	Used With
do not	안	verbs, adjectives
cannot	못	verbs
do not have	없다	nouns
am not	아니다	nouns

Think about the meaning first. Then choose the correct negative form.

3. When to Use 안, 못, 없다, and 아니다

A simple way to choose the correct form is to think about the meaning first.

안: “Do Not”

안 is used when you simply do not do something.

• 주말에 신문을 안 읽어요.
  (I do not read the newspaper on weekends.)
• 이 가방은 안 무거워요.
  (This bag is not heavy.)

Quick Pattern

안 + Verb / Adjective

👉 Explore the full guide to 안.

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못: “Cannot”

못 is used when you cannot do something because of ability, time, health, or another situation.

• 오늘은 손이 아파서 그림을 못 그려요.
  (I cannot draw today because my hand hurts.)
• 버스가 없어서 마을에 못 가요.
  (I cannot go to the village because there is no bus.)

Quick Pattern

못 + Verb

👉 Explore the full guide to 못.

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없다: “Do Not Have” or “There Is Not”

없다 shows absence or nonexistence.

• 지금 지갑에 현금이 없어요.
  (I do not have cash in my wallet right now.)
• 회의실에 사람이 없어요.
  (There is no one in the meeting room.)

Quick Pattern

Noun + 이/가 없다

👉 Explore the full guide to 있다 and 없다.

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아니다: “Am Not” or “Is Not”

아니다 is used with nouns.

• 저는 디자이너가 아니에요.
  (I am not a designer.)
• 저 건물은 도서관이 아니에요.
  (That building is not a library.)

Quick Pattern

Noun + 이/가 아니다

👉 Explore the full guide to 이/가 아니에요.

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Not sure which form to choose?

Use the quick decision guide below.

4. Quick Decision Guide for Korean Negative Forms

Choose the meaning first.

In most cases, the correct Korean negative form becomes clear once you know whether you mean do not, cannot, do not have, or am not.

Quick Decision Guide for Korean Negative Forms

If you mean…	Use
do not	안
cannot	못
do not have / there is not	없다
am not / is not	아니다

If you are unsure, start by asking yourself what you want to say: do not, cannot, do not have, or am not.

5. 안 vs 못: What Is the Difference?

Both 안 and 못 make a sentence negative, but they do not mean the same thing.

• 안 = you do not do something.
• 못 = you cannot do something.

안 vs 못 in Korean

Form	Meaning	Use When
안	do not	the speaker chooses not to do something
못	cannot	something prevents the action

Compare these two sentences:

• 오늘은 수영을 안 해요.
  (I am not swimming today.)
• 오늘은 수영을 못 해요.
  (I cannot swim today.)

The first sentence shows a choice.

The second sentence shows a limitation.

This is why 안 and 못 cannot always replace each other.

👉 Explore the full comparison between 안 and 못 to learn when native speakers choose one over the other.

6. 없다 vs 아니다: What’s the Difference?

Both 없다 and 아니다 are negative forms, but they are used differently.

• 없다 means something does not exist or is not available.
• 아니다 means someone or something is not a particular person, thing, or category.

없다 vs 아니다 in Korean

Form	Meaning	Use For
없다	do not have / there is not	absence or nonexistence
아니다	am not / is not	identity or category

Compare these two sentences:

• 회의실에 사람이 없어요.
  (There is no one in the meeting room.)
• 저 사람은 직원이 아니에요.
  (That person is not an employee.)

없다 talks about absence or nonexistence.

아니다 talks about identity or classification.

7. Which Korean Negative Form Should Beginners Learn First?

If you are a beginner, start with 안 and 못.

These are the two negative forms you will hear most often in everyday Korean conversation.

Once you are comfortable with 안 and 못, learn 없다 and 아니다.

8. Frequently Asked Questions About Korean Negative Sentences

Q1. What is the most common negative form in Korean?

안 is the most common negative form in everyday Korean conversation. Native speakers use it before verbs and adjectives to express “do not” or “not.”

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Q2. What is the difference between 안 and 못?

안 means someone chooses not to do something. 못 means someone cannot do something because of ability, time, health, or other factors.

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Q3. Can 안 and 못 be used with the same verb?

Yes. Both forms can be used with many common verbs, but the meaning changes. 안 expresses choice, while 못 expresses inability or limitation.

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Q4. What is the difference between 없다 and 아니다?

없다 means something does not exist or is not present. 아니다 means someone or something is not a particular person, thing, or category.

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Q5. Is 안 되다 a negative form in Korean?

안 되다 is different from 안. It usually means something is not allowed, does not work, or cannot be done. It often describes permission, possibility, or whether something works.

👉 Learn more about 안 되다.

9. Related Korean Negative Grammar Guides

Now that you know the basic differences between 안, 못, 없다, and 아니다, you can explore each grammar point in more detail.

Start with the guide that matches what you want to learn.

Learn More About Korean Negative Forms

👉 안: The Most Common Korean Negative Form

The easiest way to say “not” in everyday Korean.

👉 못: Expressing Inability and Limitation

Use 못 when something prevents an action.

👉 안 vs 못: Choice vs Limitation

A comparison many Korean learners struggle with.

👉 있다 and 없다: Existence and Absence

Learn how Korean expresses possession and nonexistence.

👉 이/가 아니에요: Saying “Is Not” in Korean

The standard way to negate a noun in Korean.

👉 안 되다: Not Allowed, Does Not Work, or Cannot Be Done

One of the most useful Korean expressions for beginners.