-(으)세요 vs -아요/어요: Differences, Rules and Examples

What you'll learn

• Choose -(으)세요 or -아요/어요 by looking at who performs the action.
• Form -(으)세요 on vowel stems, consonant stems and ㄹ-stems.
• Recognise the three jobs of -(으)세요: statement, question and polite request.
• Fix the most common mistake: using -(으)세요 on yourself.

Before you start: you should know the plain polite ending -아요/어요, which is taught in the lesson on 해요체 polite speech -아요/어요. A sentence needs a subject, which is the person or thing that does the action. Audio plays only when you press a button.

What Is the Difference in -(으)세요 vs -아요/어요?

The difference in -(으)세요 vs -아요/어요 is who receives respect. The ending -아요/어요 respects the listener only. The ending -(으)세요 respects the listener and also the person who does the action. Respect for the person who acts is called subject honorification (주체 높임법).

Two sentences show the contrast:

• 선생님은 뭐 하세요? (seonsaengnimeun mwo haseyo?) [선생니믄 뭐 하세요] = "What does the teacher do?" The teacher is the subject, and the speaker raises the teacher.
• 저는 학생이에요. (jeoneun haksaeng-ieyo.) [저는 학쌩이에요] = "I am a student." The speaker is the subject, so nothing is raised.

Both sentences are polite speech. A listener would not hear rudeness in either one. The difference is that the first sentence raises someone other than the speaker. The next section turns this into a rule you can apply in a few seconds.

The One-Line Rule

Use -(으)세요 when the person who acts deserves respect, and use -아요/어요 when the person who acts is you, a friend, an equal or a younger person. Ask one question before you finish the verb: "Would I bow slightly to this person?" If yes, choose -(으)세요. If no, choose -아요/어요. If you are unsure about another person, -(으)세요 is the safer error, because too much respect is rarely taken as an insult; it is never right for yourself.

Side-by-Side Table

The table compares the two endings on the points learners need most. Every row has a specific answer for each ending.

The table shows that the two endings share the same final polite layer (요) and differ in what comes before it. Next, one sentence is built step by step.

How Does -(으)세요 vs -아요/어요 Work in a Worked Example?

Choosing between the endings works by checking the subject first and the verb second. Follow the steps with the sentence "The teacher reads a book."

1. Find the subject. The subject is 선생님 (teacher). A teacher is a respected person.
2. Find the verb stem. The verb is 읽다 (to read), so the stem is 읽.
3. Choose the ending family. A respected subject calls for -(으)세요.
4. Pick 세요 or 으세요. The stem 읽 ends in a consonant, so add 으: 읽으세요. After a vowel stem you add 세요 with no 으.
5. Read the result. 선생님이 책을 읽으세요. (seonsaengnimi chaegeul ilgeuseyo.) [선생니미 채글 일그세요] = "The teacher is reading a book."

Now apply the same steps with a different subject. If the subject is a classmate, the family changes at step 3. 친구가 책을 읽어요. (chinguga chaegeul ilgeoyo.) [친구가 채글 일거요] = "My friend is reading a book." The stem 읽 takes 어요 because its last vowel is ㅣ, which is not ㅏ or ㅗ.

You will know it worked when the verb ending matches the subject and not the listener. The most common slip is choosing the ending from the listener's rank. A student can speak to a teacher about a friend using -아요/어요, because the friend is the subject. The next section shows how to choose in real situations.

Which Ending Fits Each Situation?

Choose by subject, not by the person you are talking to. The table sorts everyday situations. Each row names the subject, the right ending and a model sentence.

Notice that the classmate row keeps -아요/어요 even though the listener is a teacher. Korean grammar books call the listener-focused layer 상대 높임법 and the subject-focused layer 주체 높임법. The ending -요 belongs to the first layer, and -(으)시- belongs to the second. The lesson on honorific vs polite speech in Korean develops this idea.

The situations above follow from the subject, and a few special verbs change the whole stem, as the next section explains.

What Edge Cases and Exceptions Exist?

-(으)세요 has five edge cases that learners meet within the first weeks: special verbs, ㄹ-stems, nouns, requests and tense. Each case gives the rule and an example.

• Special honorific verbs. Some verbs have a separate honorific word. 먹다 becomes 드시다 or 잡수시다, 자다 becomes 주무시다, 있다 for a person becomes 계시다, and 말하다 becomes 말씀하시다. The polite forms are 드세요, 주무세요, 계세요 and 말씀하세요. The lesson on Korean honorific verbs 드시다 주무시다 계시다 lists them.
• ㄹ-stems. The ㄹ drops before 시: 살다 gives 사세요, and 만들다 gives 만드세요. The plain polite forms keep ㄹ: 살아요, 만들어요.
• Nouns with 이다. A noun plus "to be" becomes 이세요 after a consonant and 세요 after a vowel: 선생님이세요 (She is a teacher) and 의사세요 (He is a doctor). The negative is 아니세요.
• Requests. The form -(으)세요 is also a polite command. 앉으세요 (anjeuseyo) [안즈세요] means "Please sit down." The plain form 앉아요 [안자요] is a statement or a suggestion between equals and is not a request to a guest. The lesson on -(으)세요 grammar teaches the request use in detail.
• Tense and formal speech. Insert 었 after the honorific: 가셨어요 (He went). Formal speech uses -(으)십니다: 가십니다. The plain forms are 갔어요 and 갑니다.

An honest limit: this lesson compares the two endings for single polite sentences. It does not cover the humble forms (드리다, 뵙다), the honorific nouns (댁, 성함), or the particle 께서, which sit in the lessons on honorific -(으)시- and Korean honorific nouns. The edge cases show where the choice changes, and the next section lists the mistakes that result.

What Mistakes Do Learners Make with -(으)세요 vs -아요/어요?

Learners usually mix up the two endings in five ways, and each has a quick repair.

1. Using -(으)세요 on yourself. Learners often assume that 세요 is just "extra polite". Actually, it raises the person who acts. 저는 학생이세요 is wrong. Say 저는 학생이에요.
2. Using -아요/어요 with a respected subject. 선생님이 와요 is polite to the listener but treats the teacher as an ordinary person. For a teacher, grandparent or customer, say 선생님이 오세요.
3. Using -(으)세요 with things. Shop staff often say 커피 나오셨어요, which respects the coffee. The 국립국어원 treats this as an error, because a coffee is not a person to raise. Say 커피 나왔어요.
4. Building the consonant stem wrongly. 읽세요 and 앉세요 are not Korean. Add 으 after a consonant stem: 읽으세요, 앉으세요.
5. Forgetting the special verbs. 먹으세요 is understood but unnatural for a respected person. Say 드세요 or 맛있게 드세요.

Use this checklist when a sentence sounds off: Is the subject a person? Is that person someone I would raise? Does the stem end in a vowel, a consonant or ㄹ? Practice puts the checklist to work.

Practice and Answers

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

1. Choose the form. You talk about your grandfather. Complete: 할아버지께서 신문을 ___. (읽어요 / 읽으세요)
2. Fix the error. A learner says 저는 한국 사람이세요 about themselves. What should they say?
3. Translate. "Please sit down." Use 앉다 and the form with 으.
4. Write your own. Write one sentence with -(으)세요 about a teacher and one with -아요/어요 about yourself, using any verbs you know.

Answer key

1. 읽으세요. The grandfather is a respected subject, so the sentence is 할아버지께서 신문을 읽으세요.
2. 저는 한국 사람이에요. The speaker is the subject, so the plain polite 이에요 is correct, and 이세요 is not.
3. 앉으세요. (anjeuseyo.) The stem 앉 ends in a consonant, so 으세요 is added.
4. Answers vary. A model pair: 선생님은 커피를 드세요. (The teacher drinks coffee.) and 저는 커피를 마셔요. (I drink coffee.) Check that the teacher sentence uses 세요 and that the sentence about yourself uses 아요/어요.

A rule of thumb for checking your own work: if the English subject is "I" or "we", the ending is -아요/어요. If the English subject is "the teacher" or "your mother", the ending is probably -(으)세요.

Next Lessons after -(으)세요 vs -아요/어요

After -(으)세요 vs -아요/어요, study the honorific marker behind the contrast and the vocabulary that goes with it. This lesson compares two endings but does not teach every honorific word.

1. Start with honorific -(으)시-, which explains the marker inside 세요.
2. Continue with Korean honorific verbs 드시다 주무시다 계시다 for verbs that change completely.
3. Learn Korean honorific nouns such as 댁 (house) and 성함 (name).
4. Study the difference between respect for the listener and respect for the subject in honorific vs polite speech in Korean.
5. Browse Korean grammar differences for other pairs, or return to Korean honorifics to see the whole set.

With these steps, the choice in -(으)세요 vs -아요/어요 becomes automatic: find the subject, decide whether to raise that person, then add 세요 or 아요/어요.

Frequently Asked Questions

What is the difference between 가세요 and 가요?

가요 is polite to the listener and says nothing about the person who goes. 가세요 adds the honorific -(으)시-, so it also respects that person. Use 가요 for yourself, a friend or a younger person, and 가세요 for a teacher, a parent or a customer. Both are safe polite speech.

Can I use -(으)세요 for myself?

No. The honorific raises the person who acts, and a speaker does not raise themselves. 저는 학생이세요 is a mistake, and the correct sentence is 저는 학생이에요. A request such as 앉으세요 is not an exception, because its subject is the listener, who is asked to sit, not the speaker.

Is -(으)세요 always a request?

No. The same form works as a statement, a question or a request. 선생님이 오세요 means the teacher is coming, 어디 가세요? asks where someone is going, and 앉으세요 means please sit. Context and intonation decide which one you hear, so read the subject and the verb together.

Which ending is safer for a stranger?

-(으)세요 is usually safer when the stranger is older than you or you cannot tell the age, because it shows extra respect. -아요/어요 is also polite and is correct for peers, children and younger people. Neither ending causes offence, but a bare -아요/어요 can sound blunt to an older adult.

Do I need both endings in formal speech?

Formal speech has its own pair: -ㅂ니다/습니다 for a neutral subject and -(으)십니다 for a respected one. 갑니다 matches 가요, and 가십니다 matches 가세요. The honorific -(으)시- stays the same, and only the final ending changes from the polite -요 style to the formal style.