이에요/예요 to Be: Meaning, Rules and Examples

What you'll learn

• Attach 이에요 or 예요 to a noun by checking its last letter.
• Say "I am a student", "It is coffee" and "What is this?" in polite Korean.
• Tell polite 이에요/예요 apart from formal 입니다 and casual 이야.
• Spot and fix the error 의사이에요.

Prerequisites: you can read Hangul blocks and know what a final consonant (받침) is. Time: about 15 minutes.

Key facts

• 이에요/예요 is the polite present form of 이다, "to be", and it attaches to a noun.
• Consonant-ending noun: add 이에요. Vowel-ending noun: add 예요.
• The same form is used for "is", "am" and "are", for every person.
• 입니다 is the formal version and 이야 is the casual version of the same idea.
• The negative is the separate word 아니에요, not a change to 이에요.

Listen to the two sentences you will use as models in this lesson.

The next section explains what the ending means and what it does in a sentence.

What Does 이에요/예요 to Be Mean?

이에요/예요 means "is", "am" or "are" and tells the listener what someone or something is. It is the polite, everyday ending of the copula 이다. A copula is a linking word that joins a subject to a description, like "is" in "She is a doctor." Korean has one copula, 이다, and 이에요/예요 is the form you will hear most often.

English changes its "to be" verb for each person: "I am", "you are", "he is". Korean does not. The ending 이에요/예요 stays the same whether the subject is 저 (I), 우리 (we) or 그 사람 (that person). That makes it one of the easiest patterns to start with: there is no table of person endings to memorize.

A First Example

Here are two sentences that show the pattern on two different nouns.

The word 저는 is 저 ("I", the humble form) plus the topic particle 은/는. A particle is a small marker attached to a noun that shows its role. The topic particle is taught in topic particle 은/는. In this lesson you only need to know that 저는 sets "I" as the thing the sentence is about.

Notice what is missing: there is no separate word for "am", and no particle between 학생 and 이에요. The noun and the ending join directly. The next section shows how to choose the correct ending.

How Does 이에요/예요 to Be Work?

The ending depends on the last letter of the noun. Add 이에요 when the noun ends in a consonant (받침) and 예요 when it ends in a vowel. This is the same kind of two-way choice that appears in many Korean particles, and it exists to keep the word easy to say.

Why two forms? The ending is built from the copula stem 이 plus the polite ending 에요. After a vowel, the 이 and 에요 merge into the shorter 예요. So 의사 + 이에요 becomes 의사예요. The merged 예요 is the form standard writing uses after a vowel, so treat 의사이에요 as an error.

Pattern Table

Two details help when you speak. First, when a noun ends in a consonant, that consonant slides onto the vowel 이: 책이에요 is said [채기에요], and 선생님이에요 is said [선생니미에요]. This linking of a final consonant to a following vowel is called liaison, and the Standard Pronunciation Rules (표준 발음법) of the National Institute of Korean Language (국립국어원) describe it. Second, 학생 has a tensed [쌩] sound inside it, so it is always said [학쌩], with or without the ending.

A quick test for any noun. Look at the last syllable block. If a letter sits under the vowel (a 받침), as in 책 or 학생, use 이에요. If nothing sits under the vowel, as in 커피 or 의사, use 예요. Final ㅇ, as in 학생, counts as a consonant: ㅇ is silent at the top of a block but sounds [ng] at the bottom. The next section builds a full sentence from scratch.

Worked Example: Building 저는 학생이에요

To build 저는 학생이에요, put the topic first, add the noun, and finish with the correct ending. Four steps cover every sentence of this kind.

1. Choose what the sentence is about. To say "I", use 저는. (Friends of the same age often use the plainer 나는, but 저는 is safe with everyone.)
2. Choose the noun that says what you are. Here it is 학생, "student".
3. Check the last letter of the noun. 학생 ends in ㅇ, a consonant, so the ending is 이에요.
4. Join them and add the full stop. 저는 + 학생 + 이에요 = 저는 학생이에요.

You'll know it worked when the verb-like ending sits directly against the noun with no space and no extra particle. Compare with 저는 의사예요: step 3 finds that 의사 ends in ㅏ, a vowel, so the ending is 예요.

Notice where the ending sits. Korean sentences end with their verb or verb-like word, so 이에요/예요 always finishes the sentence. This is the Subject-Object-Verb pattern explained in the Korean SOV sentence pattern lesson. Listen to the slow versions and repeat them.

The next section places this polite form among its neighbours.

이에요/예요 vs 입니다 vs 이야

The three endings mean the same thing but belong to different speech levels. A speech level is the degree of politeness built into the verb ending. Choose the level by who you are talking to, not by what you are saying.

Two observations make this table easier to learn. First, 입니다 does not change after a vowel: the formal form is 입니다 for every noun, so 의사입니다 is correct. Second, the casual forms follow the same consonant-or-vowel logic as the polite ones: 학생이야 after a consonant and 의사야 after a vowel.

Use 이에요/예요 as your default. It is safe in almost every conversation, and it is the form most beginner courses teach first. The formal level is covered in formal speech -ㅂ니다/습니다. Use the casual level only when the other person has invited it, because using 반말 with a stranger can sound rude.

The next section covers the cases where 이에요/예요 behaves differently from what a beginner expects.

When Do You Use 이에요/예요, and When Not?

Use 이에요/예요 when you want to say that A is B, where B is a noun. Do not use it with adjectives, and do not use it to make a negative sentence. Four situations show the edges of the pattern.

1. Naming and identifying. 이에요/예요 answers "who" and "what" questions. 제 이름은 민수예요 means "My name is Minsu." The name 민수 ends in a vowel, so the ending is 예요.

2. The two most common questions. Two question words end in a vowel, so they take 예요: 뭐 ("what") and 누구 ("who"). 이게 뭐예요? means "What is this?" and 누구예요? means "Who is it?" The question word already marks the question, so the end usually falls or rises and then falls. A sentence without a question word becomes a question with a rising tone: 학생이에요? ("Are you a student?"). Question words stay in the place where the answer would stand, which is explained in Korean question word position.

3. Adjectives do not take it. In English, "is" sits in front of an adjective: "The flower is pretty." In Korean, the adjective already contains the idea of "to be". 꽃이 예뻐요 means "The flower is pretty", with no 이에요. Adding 이에요 to an adjective is a mistake. The copula joins nouns only.

4. It is not a regular verb. 이다 behaves unlike other verbs. It attaches to nouns, it has no negative form of its own, and its negative is the separate adjective 아니다, taught in 아니에요 not to be. Its relative for existence and location, 있어요, is a different word again and is taught in 있어요 없어요 meaning.

What this lesson does not cover. The past tense (학생이었어요, 의사였어요) and the honorific (선생님이세요) are separate patterns and belong to later lessons. Here the focus stays on the present polite form, because it is the foundation for both.

The next section collects the errors that appear most often.

What Mistakes Do Learners Make with 이에요/예요?

Learners make four predictable mistakes with this ending. Each has a reason and a quick fix.

Learners often assume 이에요 works after every noun. Actually the vowel-ending nouns need 예요, because the 이 merges with 에요. Wrong: 저는 의사이에요. Right: 저는 의사예요. Fix: check the last letter of the noun before you add anything.

Learners often assume the ending needs a particle in front of it. Actually the noun joins the ending directly. Wrong: 저는 학생을 이에요. Right: 저는 학생이에요. The object particle 을/를 marks the thing that receives an action, and "to be" has no action. Fix: leave the space between the noun and the ending empty.

Learners often assume the same ending makes a negative. Actually the negative of 학생이에요 is 학생이 아니에요, "is not a student". The word 아니에요 replaces 이에요, and the noun takes the particle 이/가. Fix: learn 아니에요 as a separate word.

Learners often assume the ending changes with the person. Actually 저는 학생이에요, 우리는 학생이에요 and 그는 학생이에요 all use the same ending. Fix: translate the English "am/is/are" as one fixed ending.

An honest limit: native speakers rarely say the whole sentence in short answers. A reply to 누구예요? ("Who is it?") is usually just 민수예요, with no 저는, and in casual talk many people answer with the bare name 민수. This lesson teaches the full sentence, because it is what you must be able to produce first.

Practice puts these rules into your own sentences, as the next section shows.

Practice and Answers

Complete the four tasks, then compare your answers with the key.

Task 1: choose the form. Write 이에요 or 예요 after each noun: 선생님, 커피, 가방, 의자, 친구.

Task 2: fix the error. Each sentence has one mistake. Rewrite it correctly.

1. 저는 의사이에요.
2. 이것은 책예요.
3. 저는 학생을 이에요.

Task 3: translate. Write in Korean: "I am a teacher." and "It is coffee."

Task 4: write your own. Write one sentence that says what your job or your favourite drink is.

Answer key

1. 선생님이에요, 커피예요, 가방이에요, 의자예요, 친구예요.
2. (1) 저는 의사예요. The noun ends in a vowel. (2) 이것은 책이에요. The noun ends in the consonant ㄱ. (3) 저는 학생이에요. No object particle is needed.
3. 저는 선생님이에요. 커피예요.
4. Sample answers: 저는 회사원이에요. ("I am an office worker.") 제가 좋아하는 음료는 커피예요. ("My favourite drink is coffee.") Any noun is correct if you checked its last letter.

If you answered all of task 1 correctly, you have the rule. If you missed a vowel noun, look again at the last block and check whether a letter sits under the vowel. The next section points you to what comes after this lesson.

What Should You Learn after 이에요/예요 to Be?

After 이에요/예요 to be, learn its negative partner, 아니에요, in 아니에요 not to be. It uses the same noun-based pattern, and the two lessons together let you say both "it is" and "it is not." The lesson on 있어요 없어요 meaning comes next in the sequence and covers existence and location.

For a wider view, the parent page Korean sentence structure shows how this lesson fits with basic sentence patterns, word order and subject omission. To see how 이에요/예요 compares with all the other ways to say "to be", the page korean to be gives the full picture.

This lesson covers the present polite form only. It does not cover the past tense, honorifics or the written plain style. About this page. Last updated 2026-10-09. The Korean text, spoken forms and audio on this page were machine-generated and reviewed and signed off by Min-ji Park on 15 October 2026. Romanization follows the Revised Romanization of Korean and is shown only as a learning aid.

Frequently Asked Questions

What does 이에요/예요 mean? 이에요/예요 means "is", "am" or "are" in polite Korean. It attaches to a noun to say what someone or something is, as in 저는 학생이에요, "I am a student." The same ending is used for I, you, he, she, we and they, so the English choice between "am", "is" and "are" does not exist in Korean.

How do I form 이에요/예요? Look at the last letter of the noun. If the noun ends in a consonant, add 이에요, as in 책이에요. If it ends in a vowel, add 예요, as in 의사예요. No other change is needed, and no particle sits between the noun and the ending. The same two forms are used for questions with a rising tone.

What is the most common mistake with 이에요/예요? The most common mistake is adding 이에요 to a noun that ends in a vowel, which produces the wrong form 의사이에요. The correct form is 의사예요. The second mistake is using 이에요 to make a negative. The negative is the separate word 아니에요, as in 학생이 아니에요, "I am not a student."

How is 이에요/예요 different from 입니다 and 이야? The three forms mean the same thing at different politeness levels. 이에요/예요 is polite and fits most daily speech. 입니다 is formal and suits speeches, news and first meetings. 이야 or 야 is casual and suits close friends and family. Choosing the wrong level sounds stiff, or too familiar, to Korean listeners.

Do I use 이에요/예요 in speech, writing or both? 이에요/예요 is mainly a spoken form, used in conversation, messages and informal emails. Formal writing such as news, essays and textbooks normally uses the plain form 이다 or the formal 입니다 instead. A learner can use 이에요/예요 for texting and speaking and switch to 입니다 for formal situations.

Save This to Pinterest