-아/어도 되다 Grammar in Korean: Meaning and How to Use It

What you'll learn

• Attach -아/어도 to any stem, choosing between -아도, -어도 and 해도.
• Ask "May I...?" and answer yes or no in a natural way.
• Say the past, the formal and the extra-polite forms (됐어요, 됩니다, 될까요).
• Give a polite refusal with the right pattern.
• Tell -아/어도 되다 apart from -(으)면 안 되다, -(으)ㄹ 수 있다 and -(으)면 되다.

Before you start: you should know how to find a verb stem (drop 다 from the dictionary form) and the polite ending -아요/어요. If stems are new to you, read about verb stems first. Audio plays only when you press a button.

What Does -아/어도 되다 Grammar Mean?

-아/어도 되다 grammar means "it is all right to do this" or "you may do this." It joins two parts. The first part is -아/어도, which means "even if." The second part is 되다, which here means "to be acceptable." Together they say "even if you do it, it is fine." Korean speakers use that idea to give and ask for permission.

Here are the first two examples. The pattern is the same in both, and only the verb changes.

• 여기에서 사진을 찍어도 돼요? (yeogieseo sajineul jjigeodo dwaeyo?) [여기에서 사지늘 찌거도 돼요] = "May I take photos here?"
• 네, 앉아도 돼요. (ne, anjado dwaeyo.) [네, 안자도 돼요] = "Yes, you may sit."

A question and its answer use the same words. Only the sentence melody changes, and the speaker adds 네 ("yes") when answering. A yes/no question usually ends with a rise, so you say 돼요? with the pitch going up. The statement 돼요. stays level or falls.

The same words can also mean "even if you do X, it is acceptable," not only "you may." For example, 방이 작아도 돼요 can mean "A small room is fine." So the idea of permission is really an idea of tolerance: the speaker accepts the choice. The next section shows how to build the pattern.

How Do You Form -아/어도 되다?

-아/어도 되다 is formed by dropping 다 from the dictionary form, adding -아도 or -어도 to the stem, and then adding 되다. The choice between 아 and 어 follows vowel harmony. If the last vowel of the stem is ㅏ or ㅗ, add -아도. For every other vowel, add -어도. For 하다 verbs, the result is 해도.

The table shows one rule applied to seven verbs. Notice that the form before 도 is the same as the polite verb ending without 요: 앉아요 becomes 앉아도. If you already know the polite present, you can build -아/어도 by removing 요 and adding 도. The next three parts look at the groups of stems one at a time.

Stems Ending in a Vowel

A vowel stem often shortens when 아/어 is added. A stem ending in ㅏ keeps just one ㅏ, so 가 + 아 becomes 가. A stem ending in ㅗ joins 아 into ㅘ, so 보 + 아 becomes 봐. A stem ending in ㅣ joins 어 into ㅕ, so 마시 + 어 becomes 마셔. Examples:

• 지금 집에 가도 돼요? (jigeum jibe gado dwaeyo?) [지금 지베 가도 돼요] = "May I go home now?"
• 이거 봐도 돼요? (igeo bwado dwaeyo?) = "May I look at this?"

Vowel stems are the simplest case to hear. A stem with a final consonant looks longer on the page but follows the same rule.

Stems Ending in a Consonant

A consonant stem takes -아도 or -어도 directly, with no linking vowel. Choose by the last vowel: 앉 has ㅏ, so 앉아도. 먹 has ㅓ, so 먹어도. 읽 has ㅣ, so 읽어도.

• 이 책을 읽어도 돼요? (i chaegeul ilgeodo dwaeyo?) [이 채글 일거도 돼요] = "May I read this book?"
• 이 김치를 먹어도 돼요? (i gimchireul meogeodo dwaeyo?) [이 김치를 머거도 돼요] = "May I eat this kimchi?"

The spelling keeps the final consonant, but the sound moves to the next syllable. 읽어도 is spoken [일거도] and 먹어도 is spoken [머거도]. This is the ordinary linking of a final consonant to a following vowel in the standard pronunciation rules (표준 발음법) of the 국립국어원 (National Institute of Korean Language). Write the plain spelling and say the linked sound.

Two more groups need a short note, because learners expect trouble with them.

Do Irregular Stems and Nouns Change?

Irregular stems change before -아/어도, because 아 and 어 begin with a vowel. Check each type with the polite form you already know:

• ㄷ-irregular: 듣다 becomes 들어도. 이 음악을 들어도 돼요? = "May I listen to this music?"
• ㅂ-irregular: 돕다 becomes 도와도, and 춥다 becomes 추워도.
• 르-irregular: 누르다 becomes 눌러도, and 모르다 becomes 몰라도.
• ㅡ-stems: 쓰다 becomes 써도, and 바쁘다 becomes 바빠도.
• ㄹ-stems: 열다 becomes 열어도 and 만들다 becomes 만들어도. The ㄹ stays, because 아/어 are not ㄴ, ㅂ or ㅅ.

Adjectives take the same ending, which is a useful difference from some other sentence patterns. 방이 작아도 돼요 (bangi jagado dwaeyo) [방이 자가도 돼요] means "A small room is fine." For a noun, use the copula: 학생이어도 돼요 means "It's fine to be a student," and after a vowel the form is -여도, as in 의사여도 돼요. With the forms clear, one sentence can be built step by step.

Worked Example: Building a Sentence with -아/어도 되다

-아/어도 되다 grammar works by turning a plain action into a request. Follow the steps with the idea "May I open the window?"

1. Start with the verb. The verb is 열다 (to open). Its dictionary form ends in 다.
2. Find the stem. Drop 다. The stem is 열. It ends in the consonant ㄹ.
3. Choose 아 or 어. The last vowel of 열 is ㅕ, which is not ㅏ or ㅗ, so choose 어. 열 + 어 = 열어.
4. Add 도. 열어 + 도 = 열어도.
5. Add 되다 in the polite style. 되다 becomes 돼요. The full ending is 열어도 돼요.
6. Rebuild the sentence. Put the object first: 창문을 열어도 돼요? (changmuneul yeoreodo dwaeyo?) [창무늘 여러도 돼요] = "May I open the window?"

You will know it worked when the object (창문을) stays in front and only the last word carries the new meaning. The most common slip at this step is to put 도 before the vowel is added, as in 열도 돼요. Always add 아 or 어 first. The sentence is now a question, but the pattern has limits on tense and sentence type.

Which Tenses and Sentence Types Work with -아/어도 되다?

-아/어도 되다 works in the present, the past and the polite-request form, in statements and in questions. All changes happen on 되다, the last word. The table shows the forms for 앉다.

Here is how the forms are spoken. 됐어요 is [돼써요] (dwaesseoyo), and 됩니다 is [됨니다] (doemnida), because the ㅂ before ㄴ is spoken as ㅁ. 될까요 is spelled with ㄲ, so the written form already shows the tense sound: doelkkayo.

• 어제는 늦게 와도 됐어요. (eojeneun neutge wado dwaesseoyo.) = "Yesterday it was fine to come late."
• 여기에 앉아도 될까요? (yeogie anjado doelkkayo?) = "Would it be all right if I sat here?"

The past marker goes on 되다 and never on the main verb. The pattern is not used for commands or suggestions on its own. You cannot say "Please sit" with it, because the ending only permits, it does not ask the listener to act. The most useful contrast is with the pattern that refuses.

How Is -아/어도 되다 Different from -(으)면 안 되다?

-아/어도 되다 gives permission, while -(으)면 안 되다 refuses it. Together they form a pair: one says "you may," the other says "you must not." The refusal is built from -(으)면 ("if") and 안 되다 ("it does not work"), so 찍으면 안 돼요 is literally "if you take photos, it does not work."

A common error is to answer "May I?" with the same pattern plus 안: 찍어도 안 돼요. That form sounds like "even if you take them, it is not fine," and it is not the normal way to refuse. Use the pair above, as in 아니요, 여기에서는 사진을 찍으면 안 돼요 (aniyo, yeogieseoneun sajineul jjigeumyeon an dwaeyo) [아니요, 여기에서는 사지늘 찌그면 안 돼요]. The full rules are on the page for -(으)면 안 되다.

Two other neighbours are easy to confuse with this pattern.

• -(으)ㄹ 수 있다/없다. This means "can" and "cannot." It states ability or possibility: 여기에서 수영할 수 있어요 means "It is possible to swim here." The permission pattern says whether swimming is allowed: 여기에서 수영해도 돼요 means "You may swim here." Read the page for -(으)ㄹ 수 있다/없다 for the full rules.
• -(으)면 되다. This means "all you need to do is." 이 버튼을 누르면 돼요 means "Just press this button." It looks similar because both end in 돼요, but it says what is enough, not what is allowed. See -아/어도 되다 vs -(으)면 되다 and the lesson on -(으)면 되다.

A last point is the ending's origin. -아/어도 also works alone as a connector meaning "even if" or "even though," which has its own lesson at -아/어도 (even if, even though). In the permission pattern, 되다 completes the idea. These contrasts lead to the smaller variations of the pattern itself.

Variations and Edge Cases of -아/어도 되다

-아/어도 되다 has four common variations: softer neighbours, a careful request, an honorific form and a casual short form. Each one appears in real conversation.

• -아/어도 괜찮다. Replace 되다 with 괜찮다 ("to be fine"): 여기에 앉아도 괜찮아요 (yeogie anjado gwaenchanayo) [여기에 안자도 괜차나요] = "It is fine to sit here." It sounds softer and warmer. It is the natural reply when someone asks "Is it okay?" and you want to reassure them.
• -아/어도 좋다. Replace 되다 with 좋다 ("to be good"): 앉아도 좋아요 means "You are welcome to sit." It is a little more formal and often offers something to the listener.
• -아/어도 될까요? Add -(으)ㄹ까요 to 되다 for a gentle, careful request: 여기에 앉아도 될까요? Service staff, guests and students often choose it with strangers.
• Honorific -(으)시-. When the person who is allowed to act deserves respect, add -(으)시- before 어도: 먼저 가셔도 돼요 (meonjeo gasyeodo dwaeyo) = "You may go first." The full rule is on honorific -(으)시-.

In informal speech with friends, the 요 is dropped: 가도 돼? (gado dwae?) = "Can I go?" and 가도 돼. = "You can go."

This lesson covers permission and tolerance in daily life, not every use of -아/어도. The connector "even if" is on its own page, as noted above. The mistakes below show where the boundary causes real errors.

What Mistakes Do Learners Make with -아/어도 되다?

Learners most often get the refusal, the spelling or the stem wrong. Four mistakes appear again and again.

1. Refusing with -아/어도 안 돼요. Use -(으)면 안 돼요 instead. For a softer refusal, use 죄송하지만 and the same pattern: 죄송하지만 여기에서는 찍으면 안 돼요 ("Sorry, but you cannot take photos here").
2. Spelling 돼요 as 되요. 되요 is wrong. 돼요 is the shortened form of 되어요. Put 하 or 해 in the same slot: 해요 fits and 하요 does not, so write 돼요. The page on 되 vs 돼 explains the test.
3. Putting the past on the main verb. 왔어도 돼요 is not the way to say "It was fine to come." Put the past on 되다: 와도 됐어요.
4. Choosing the wrong vowel. 읽아도 and 먹아도 are wrong. Check the last vowel of the stem: only ㅏ and ㅗ take 아.

A quick check for any permission sentence: Is the stem followed by 아/어도? Is 도 directly attached? Is the refusal built with -(으)면 안 돼요? If all three answers are yes, the sentence is sound.

The practice set below tests these four points directly.

Practice and Answers

Try the four items before you read the answer key. Cover the answers with your hand.

1. Choose the form. Complete: 이 책을 ___ ? (읽어도 돼요 / 읽아도 돼요)
2. Fix the error. A learner answers 아니요, 앉아도 안 돼요 to "May I sit here?" and means "No." Correct it.
3. Translate. "May I eat this kimchi?" Use 먹다 and the polite style.
4. Write your own. Write one sentence that asks permission to do something in a room, using -아/어도 돼요. Then write the careful version with 될까요.

Answer key

1. 읽어도 돼요. The last vowel of 읽 is ㅣ, so the ending is -어도.
2. 아니요, 앉으면 안 돼요. The refusal uses -(으)면 안 되다.
3. 이 김치를 먹어도 돼요? (i gimchireul meogeodo dwaeyo?) = "May I eat this kimchi?"
4. Answers vary. Check that 아/어 is chosen by vowel harmony and that the careful version ends in 될까요. An example: 창문을 열어도 돼요? → 창문을 열어도 될까요? ("May I open the window?" → "Would it be all right if I opened the window?")

If you can complete items 1 to 3 without the key, you can use the pattern in conversation. Next, the lesson hands off to related patterns.

What Should You Learn Next after -아/어도 되다 Grammar?

After -아/어도 되다 grammar, learn the pattern that refuses, then the one that states what is enough. This lesson teaches permission and does not cover prohibition, obligation or "all you need to do" in depth. Those live on their own pages.

1. Start with -(으)면 안 되다, which is the negative counterpart.
2. Continue with -(으)ㄹ 수 있다/없다, which covers ability and possibility.
3. Compare the look-alike in -아/어도 되다 vs -(으)면 되다.
4. For the opposite request, learn the polite command -지 마세요 don't and the general negative -지 않다 negation.
5. Return to Obligation and Permission to see every lesson in this set, or to the Beginner Grammar list for other A2 patterns.

With these steps, -아/어도 되다 becomes automatic: take the stem, add 아/어도, finish with 돼요, and refuse with -(으)면 안 돼요.

Frequently Asked Questions

What does -아/어도 되다 mean?

-아/어도 되다 means "may" or "it is okay to." It gives or asks for permission. 앉아도 돼요 means "You may sit," and 앉아도 돼요? means "May I sit?" The literal sense is "even if you sit, it works out." The ending does not describe ability. It describes what is allowed or acceptable.

How do I attach -아/어도 되다 to a verb or adjective?

Take the stem and add -아도 if the last vowel is ㅏ or ㅗ, otherwise -어도. 앉다 gives 앉아도, 먹다 gives 먹어도, and 하다 gives 해도. Then add 되다 in the speech level you need: 돼요 for polite. Adjectives work the same way: 작아도 돼요 means "small is fine."

Can -아/어도 되다 be used in the past tense?

Yes, but the past marker goes on 되다, not on the main verb. 어제는 늦게 와도 됐어요 means "Yesterday it was fine to come late." Do not write 왔어도 돼요 for this meaning. For a polite request about the future, use 될까요: 앉아도 될까요? means "Would it be all right if I sat?"

Is -아/어도 되다 used in speech or only in writing?

It is used mostly in speech. Everyday conversation uses 돼요 and casual 돼. Signs and written rules use 됩니다, as in 앉아도 됩니다 ("You may sit"). In short answers, many speakers say 괜찮아요 ("It's fine") instead, which is softer and just as common.

What is the most common mistake with -아/어도 되다?

The most common mistake is the refusal. Learners answer "May I?" with -아/어도 안 돼요, but that sounds like "even if you do it, it is not okay," which is confusing. Use -(으)면 안 돼요 instead: 찍으면 안 돼요. A second mistake is spelling 돼요 as 되요, which is wrong.

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