Negating 하다 Verbs 공부 안 해요: Meaning, Rules and Examples

What you'll learn

• Place 안 and 못 correctly in noun + 하다 verbs such as 공부하다 and 운동하다.
• Sort a 하다 word into one of three types before you negate it.
• Negate descriptive words such as 피곤하다 without splitting them.
• Form the past tense: 공부 안 했어요.
• Fix the mistake of writing 안 공부해요 or 피곤 안 해요.

Before you start: you should know the short negatives from 안 negation in Korean and 못 can't in Korean, and the polite ending -아요/-어요. Audio plays only when you press a button.

What Does Negating 하다 Verbs 공부 안 해요 Mean?

Negating 하다 verbs 공부 안 해요 means placing the negative word inside a verb that ends in 하다. A 하다 verb is a verb made of a noun and the verb 하다 ("to do"): 공부 (study) + 하다 = 공부하다 (to study). Because the noun and 하다 behave like two parts, the negative word 안 goes between them: 공부 안 해요 (I don't study).

Korean has thousands of these verbs, so the pattern is worth learning early. English has no equivalent, which is why learners expect 안 to sit at the very front.

Two First Examples

Two sentences show the split. The Revised Romanization (RR) after each one is a learning aid only.

• 저는 매일 운동 안 해요. (jeoneun maeil undong an haeyo.) = "I don't exercise every day." The noun 운동 (exercise) stays first, then 안, then 해요.
• 저는 오늘 공부 못 해요. (jeoneun oneul gongbu mot haeyo.) [공부 모태요] = "I can't study today." The slot is the same, but 못 shows that something blocks you.

Both sentences keep 해요 at the end, and only the noun, 안 or 못 differ. The next step is to see that not every 하다 word follows this pattern.

How Does Negating 하다 Verbs Work?

Negating 하다 verbs works differently for three types of word, so sort the word first and then place the negative. The three types are action verbs (noun + 하다), descriptive words (하다 adjectives that describe a state) and fixed verbs (-아/어하다 words). Use the table as a decision tool.

How do you tell the types apart? Ask what the word does in English. If the English word is "to study", "to exercise" or "to clean", it is an action, and you split it. If the English word is "tired", "clean" or "necessary", it describes a state, and you do not split it. If the English word is "like", it is a fixed verb that you also do not split.

Which Common Verbs Follow the Split Pattern?

Common action verbs that split are 공부하다, 운동하다, 청소하다, 일하다, 전화하다, 요리하다, 쇼핑하다 and 숙제하다. Each one has a noun that you can say on its own, which is the sign that the word can split.

The test is simple: if the first part is a noun you can say alone, such as 전화 (phone call), the word splits. In this slot 못 keeps its "cannot" meaning, so 요리 못 해요 is "I can't cook (now)," while the one-word 요리를 못해요 would mean "I'm bad at cooking."

The long form avoids the sorting problem, because it uses the same pattern for all three: 공부하지 않아요, 피곤하지 않아요 and 좋아하지 않아요. See -지 않다 negation for the long form in detail. The long form is useful, but the short form is faster in speech, so the worked example below practises it.

Worked Example: Negating 운동하다

Follow these steps to turn "I exercise every day" into "I don't exercise every day."

1. Start with the positive sentence. 저는 매일 운동해요. (jeoneun maeil undonghaeyo.) = "I exercise every day." The verb is 운동해요, from 운동하다.
2. Identify the type. 운동 means "exercise" and the English verb is "to exercise", so this is an action: noun + 하다.
3. Split the verb. Write 운동 and 해요 as two words: 운동 해요.
4. Put 안 between them. The order is 운동 + 안 + 해요.
5. Read the result. 저는 매일 운동 안 해요. (jeoneun maeil undong an haeyo.) = "I don't exercise every day."

You will know it worked when the sentence has the noun first and then two short words at the end. A common slip at step 3 is forgetting that 해요 is the polite form of 하다. The vowel changes (하다 → 해요), but 안 does not.

Now try a descriptive word. 방이 깨끗해요 (bangi kkaekkeutaeyo) means "The room is clean." The word 깨끗하다 describes a state, so the negative goes in front: 방이 안 깨끗해요 = "The room isn't clean." Splitting it, as in 방이 깨끗 안 해요, is not standard.

With the split clear, the next question is how this pattern relates to the forms around it.

How Is 하다 Verb Negation Different from Similar Forms?

하다 verb negation differs from ordinary negation because the split is only for action nouns. For most verbs, 안 sits right before the verb. The table compares four cases of the same idea, "do not."

The table shows why the split is not a universal rule. A single verb like 가다 has no inner parts, a descriptive word acts like an adjective, and a fixed verb counts as one word. Only noun + 하다 actions have an inner seam where 안 can fit.

The same split applies to 못. 운동 못 해요 means "I can't exercise." For a full comparison of the two short negatives, read 안 vs 못. To see the basic 하다 verb pattern, read 하다 verbs: noun + 하다.

The rules are clear, but several edge cases appear in real speech.

Using the Pattern: When and When Not

Use the split pattern for action nouns, and use the whole-word pattern for descriptions. A few details keep the pattern natural.

• The particle is optional. You may add 을/를 after the noun: 공부를 안 해요 and 공부 안 해요 mean the same. The particle adds a little emphasis, and everyday speech often drops it.
• Past tense. The verb 해요 becomes 했어요: 공부 안 했어요 (gongbu an haesseoyo) = "I didn't study." See negative past tense in Korean for more.
• Future. 공부 안 할 거예요 means "I won't study." Here 할 is the future form of 하다.
• Requests. 안 does not make "don't." Use 공부하지 마세요 (Please don't study). See -지 마세요 don't.
• Spelling of 못. 공부 못 해요, with a space, means "I can't study." 공부를 못해요, with 못해요 as one word, means "I'm bad at studying."

An honest limit: Korean speakers sometimes say 안 공부해요 or 안 운동해요, especially in casual conversation, and some usage guides accept them. Textbooks and exams treat 공부 안 해요 as the standard form, so this lesson teaches it first. If you hear the other order, you will still understand it.

Learners can avoid most errors by using the type table, and the mistakes below show what goes wrong without it.

What Mistakes Do Learners Make with 하다 Verbs?

Learners most often split the wrong words or fail to split the right ones. Four mistakes are worth fixing.

1. Writing 안 공부해요. Learners often assume that 안 always goes at the front. Actually, for action nouns the standard place is between the noun and 하다, so 공부 안 해요 is the form to use.
2. Splitting a descriptive word. 피곤 안 해요 and 깨끗 안 해요 sound wrong. Use 안 피곤해요 and 안 깨끗해요, or the long forms 피곤하지 않아요 and 깨끗하지 않아요.
3. Splitting a fixed verb. 좋아 안 해요 is wrong, because 좋아하다 is one word. Say 안 좋아해요.
4. Using 못 with a descriptive word. 못 피곤해요 is not possible. 못 needs an action, and 피곤하다 is a state.

A quick checklist: Is the word an action or a state? If it is an action built from a noun, split it. If it is a state or a fixed verb, put 안 in front. Now test the checklist with the exercises.

Practice and Answers

Try these four items first. The answers follow.

1. Choose the form. "I don't clean." You choose not to. Complete: 저는 청소 ___ 해요. (안 / 못)
2. Fix the error. A learner writes 저는 피곤 안 해요 for "I'm not tired." Correct it.
3. Translate. "I can't work today." Use 일하다 and 못.
4. Write your own. Write one sentence with a 하다 action verb negated with 안, and one with a fixed verb (좋아하다 or 싫어하다) negated with 안.

Answer key

1. 저는 청소 안 해요. 청소하다 is an action verb, so 안 goes between 청소 and 해요. (The other pattern, 안 청소해요, is heard but not the standard form.)
2. 저는 안 피곤해요. 피곤하다 is a descriptive word, so 안 goes in front of the whole word.
3. 저는 오늘 일 못 해요. (jeoneun oneul il mot haeyo.) 일하다 means "to work", so 못 goes between 일 and 해요.
4. Answers vary. Examples: 저는 숙제 안 해요 (I don't do homework) and 저는 매운 음식을 안 좋아해요 (I don't like spicy food). Check that 안 sits between the noun and 해요 in the first sentence, and before the whole verb in the second.

If all four feel easy, the main pattern is secure. The last section shows what to study next.

Next Lessons: What to Learn after Negating 하다 Verbs

After negating 하다 verbs, learn the negative past tense, then negative questions. This lesson covers 안 and 못 in 하다 verbs. It does not cover every 하다 compound, such as passive 되다 verbs, which are a different set.

1. Continue with negative past tense in Korean, the next lesson in the set.
2. Review the 하다 verb pattern in 하다 verbs: noun + 하다.
3. Compare the short forms with 안 negation in Korean and 못 can't in Korean.
4. Learn the long form in -지 않다 negation.
5. Return to Korean negation to see every lesson in the set.

When 공부 안 해요 and 안 피곤해요 feel natural on first try, negating 하다 verbs is ready for daily use.

Frequently Asked Questions

Why is it 공부 안 해요 and not 안 공부해요?

공부하다 is built from the noun 공부 (study) and the verb 하다 (do). The standard rule puts 안 in front of the verb part, so it lands between them: 공부 안 해요. You may hear 안 공부해요 in casual speech, but textbooks and exams treat 공부 안 해요 as the correct form for learners.

Do I need the object particle 를 in 공부를 안 해요?

No. Both 공부 안 해요 and 공부를 안 해요 are correct. The particle 을/를 marks the noun as the object and adds a little emphasis, but everyday speech often drops it. Beginners can leave it out and still be understood. The meaning is the same.

How do I say "I can't study" with a 하다 verb?

Replace 안 with 못: 공부 못 해요 means "I can't study". The word 못 goes between the noun and 하다, the same slot as 안. Spacing matters, because 공부를 못해요 as one word means "I am bad at studying" and 공부 못 해요 means "I can't study (now)".

How do I negate 피곤하다 (to be tired)?

Put 안 in front of the whole word: 안 피곤해요 means "I am not tired". 피곤하다 describes a state, so it behaves like an adjective and is not split. The long form is 피곤하지 않아요. Writing 피곤 안 해요 is not standard and sounds odd to Korean ears.

Is the negative of 좋아하다 the same as for 공부하다?

No. 좋아하다 (to like) is a single verb made from the adjective 좋다 plus -아하다, so 안 goes before it: 안 좋아해요 means "I don't like it". Writing 좋아 안 해요 is wrong. Treat 좋아하다 and 싫어하다 as whole words, and only split verbs that start with a noun.