目錄
“Korean adjectives” can appear directly at the end of a sentence to complete it, without adding 「이다」 as an equivalent of Chinese “是.” In sentences such as 「날씨가 좋아요」, 「사진이 예뻐요」, and 「방이 커요」, the adjective itself is enough to complete the sentence. What tends to be confusing at first is that forms such as 좋다, 예쁘다, and 크다 change depending on where they appear. At the end of a sentence, they become 좋아요, 예뻐요, and 커요, while before a noun they become 좋은, 예쁜, and 큰. If you separate these two positions first, it becomes easier to avoid mixing them up later when you encounter past-tense and connective forms.
What Are “Korean Adjective Sentences”? The Most Common Point of Confusion for Beginners
“Korean adjective sentences” are a basic sentence pattern frequently encountered in beginner Korean. They are used to describe weather, photos, rooms, feelings, food, atmosphere, and more. The first step is to distinguish between sentence-final forms and noun-modifying forms. This makes it easier to avoid mixing different conjugations later when you encounter past tense, connective endings, or longer noun-modifying constructions.
Many mistakes come from mechanically applying the Chinese word “是” to Korean. The Korean adjective 「좋다」 already means “to be good,” and once it becomes the sentence-final form 「좋아요」, it forms a complete sentence on its own. There is no need to add 「이다」.
How Do Korean Adjectives Change? Present Tense, Past Tense, and Noun Modification
Korean adjectives have dictionary forms ending in 「다」. When forming a sentence, first remove 「다」, then conjugate the stem according to the vowel and ending rules.
| Dictionary Form | Present Polite Form | Past Polite Form | Present Noun-Modifying Form | Meaning in Chinese |
| 좋다 | 좋아요 | 좋았어요 | 좋은 | 好、好的 |
| 예쁘다 | 예뻐요 | 예뻤어요 | 예쁜 | 漂亮、漂亮的 |
| 크다 | 커요 | 컸어요 | 큰 | 大、大的 |
「좋아요」「예뻐요」「커요」appear at the end of a sentence, while 「좋은」「예쁜」「큰」appear before nouns. These two positions must be learned separately.
Usage ① of “Korean Adjective Sentences”｜Describing the Subject’s Current State
When a “Korean adjective” appears at the end of a sentence, it can describe the subject’s current state. A common structure is 「noun＋이/가＋present polite adjective form」, although 「은/는」 may also be used in actual conversation depending on topic or contrast. Chinese translations often naturally add “很,” but the Korean sentence does not necessarily contain degree adverbs such as 「아주」 or 「매우」.
- Example: 날씨가 좋아요.
Romanization: nal-ssi-ga jo-a-yo
Translation: The weather is good.
「좋아요」directly describes the state of the weather, so there is no need to add 「이다」. - Example: 사진이 예뻐요.
Romanization: sa-ji-ni ye-ppeo-yo
Translation: The photo is pretty.
When 「예쁘다」is used at the end of a sentence, it contracts to 「예뻐요」 and describes the appearance of the photo. - Example: 방이 커요.
Romanization: bang-i keo-yo
Translation: The room is big.
「크다」becomes 「커요」, and the adjective itself serves as the core predicate of the sentence.
Usage ② of “Korean Adjective Sentences”｜Describing a Past State or Impression
“Korean adjectives” can also take the past-tense ending 「-았/었어요」 to indicate that a state was true at a particular point in the past. For example, 「좋았어요」means something was good at that time, 「예뻤어요」means something was pretty at that time, and 「컸어요」means something was big at that time.
- Example: 어제 날씨가 좋았어요.
Romanization: eo-je nal-ssi-ga jo-a-sseo-yo
Translation: The weather was good yesterday.
「좋았어요」describes the state at the point in time referred to as yesterday. - Example: 그 카페가 정말 예뻤어요.
Romanization: geu ka-pe-ga jeong-mal ye-ppeo-sseo-yo
Translation: That café was really pretty.
「예뻤어요」looks back on what the café looked like when the speaker visited it. - Example: 예전 집은 꽤 컸어요.
Romanization: ye-jeon ji-beun kkwae keo-sseo-yo
Translation: The old house was quite large.
「컸어요」describes the size of the house in the past and does not mean that it is necessarily still the same now.
Usage ③ of “Korean Adjective Sentences”｜Placing Them Before Nouns to Mean “…”
When a “Korean adjective” modifies the noun that follows it, the dictionary form cannot be used directly. To describe a present state, stems with a final consonant generally take 「-은」, while stems without a final consonant take 「-ㄴ」. As a result, 「좋다」becomes 「좋은」, 「예쁘다」becomes 「예쁜」, and 「크다」becomes 「큰」. These forms appear before nouns and function similarly to the Chinese 「……的」.
- Example: 좋은 사람을 만났어요.
Romanization: jo-eun sa-ra-meul man-na-sseo-yo
Translation: I met a good person.
「좋은」appears before 「사람」 and means a good person. - Example: 예쁜 가방을 샀어요.
Romanization: ye-ppeun ga-bang-eul sa-sseo-yo
Translation: I bought a pretty bag.
「예쁜」modifies 「가방」; you cannot say 「예쁘다 가방」. - Example: 큰 창문이 있는 방이에요.
Romanization: keun chang-mu-ni in-neun bang-i-e-yo
Translation: It is a room with a large window.
「큰」modifies 「창문」 and describes the size of the window.
How Are 「좋아요」 and 「좋은」 Different? Comparing Position and Function
| Comparison | Sentence-Final Form | Noun-Modifying Form |
| Position | At the end of a sentence | Before a noun |
| Function | Completes a sentence | Modifies a noun |
| 좋다 | 좋아요 | 좋은 사람 |
| 예쁘다 | 예뻐요 | 예쁜 사진 |
| 크다 | 커요 | 큰 방 |
▌What Is the Difference Between 「좋아요」 and 「좋은」? Sentence-Final and Noun-Modifying Forms Cannot Be Interchanged
❌ Incorrect: 좋아요 사람
✅ Correct: 좋은 사람
「좋아요」is a sentence-final form, so it cannot be placed directly before a noun. To modify 「사람」, you need to use the noun-modifying form 「좋은」.
▌Can 「예쁘다」 Be Placed Directly Before a Noun? It Must Change to 「예쁜」
❌ Incorrect: 예쁘다 가방
✅ Correct: 예쁜 가방
The dictionary form 「예쁘다」cannot be placed directly before a noun. To modify 「가방」, it must be changed to the noun-modifying form 「예쁜」.
Korean Adjectives in Everyday Conversation: How to Talk About Weather, Photos, and Rooms
Adjective sentences are one of the most useful basic sentence patterns in everyday Korean. Weather, photos, rooms, food, atmosphere, and impressions can all be described directly with adjectives.
▌Situation ①｜Talking About the Weather
A：오늘 날씨 어때요?
o-neul nal-ssi eo-ttae-yo
How is the weather today?
B：날씨가 좋아요. 산책하기 딱 좋아요.
nal-ssi-ga jo-a-yo. san-chaek-ha-gi ttak jo-a-yo
The weather is nice. It is perfect for a walk.
📌 Grammar Point: 「좋아요」appears directly at the end of the sentence to describe a state, without adding 「이다」.
▌Situation ②｜Complimenting a Photo
A：이 사진 어때요?
i sa-jin eo-ttae-yo
How is this photo?
B：정말 예뻐요. 색감도 좋아요.
jeong-mal ye-ppeo-yo. saek-gam-do jo-a-yo
It is really pretty. The colors are nice too.
📌 Grammar Point: 「예뻐요」and 「좋아요」are both sentence-final adjective forms.
▌Situation ③｜Looking at a Room
A：이 방은 어때요?
i bang-eun eo-ttae-yo
How is this room?
B：방이 크고 창문도 커요.
bang-i keu-go chang-mun-do keo-yo
The room is big, and the window is big too.
📌 Grammar Point: 「크고」is a connective form of the adjective, while 「커요」appears at the end of the sentence to complete it.
Cultural Notes:
- 「이/가」is a subject particle used to mark the subject of a sentence, while 「은/는」is often used to establish a topic or create contrast. For example, in 「오늘은 날씨가 좋아요」, 「오늘은」is the topic and 「날씨가」is the subject.
- 「예뻐요」is not only used to describe people’s appearance. It is also commonly used for the appearance of photos, bags, cafés, rooms, and other things.
- In menus, property listings, and travel reviews, noun-modifying forms such as 「좋은」「예쁜」「큰」appear frequently.
How Does the Korean “Adjective Sentence” Compare with Japanese 「い-Adjectives／な-Adjectives」?
◆ Similar Grammar: Japanese 「い-Adjectives／な-Adjectives」
Japanese adjectives can also appear at the end of a sentence to describe a state or before a noun to modify it. Japanese adjectives are divided into 「い-adjectives」 and 「な-adjectives」. An 「い-adjective」can be placed directly before a noun when modifying it, as in 「大きい部屋」. A 「な-adjective」requires 「な」before the noun, as in 「きれいな写真」. Korean adjectives, by contrast, take different endings depending on whether they appear at the end of a sentence or before a noun.
- Example: 天気がいいです。
Kana: てんきがいいです。
Translation: The weather is good.
Like the Korean 「날씨가 좋아요」, this sentence places the adjective at the end to describe a state. - Example: きれいな写真ですね。
Kana: きれいなしゃしんですね。
Translation: That is a pretty photo.
The Japanese 「きれいな」appears before the noun and functions similarly to the Korean 「예쁜 사진」.
◆ Core Difference from “Adjective Sentences”:
Korean adjectives have dictionary forms ending in 「다」, and their forms change depending on their position and the ending that follows. In Japanese, you first need to determine whether an adjective is an 「い-adjective」or a 「な-adjective」, and then choose the appropriate form depending on whether it appears at the end of a sentence or before a noun. Korean 「예쁜 사진」and Japanese 「きれいな写真」can both be translated into Chinese as 「漂亮的照片」, but the two languages use different attachment rules, so you cannot rely on the Chinese 「的」alone to determine the grammar.
With “Korean adjectives,” the first thing to check is whether the adjective appears at the end of a sentence or before a noun. At the end of a sentence, forms such as 좋아요, 예뻐요, and 커요 describe a state; before a noun, they change to 좋은, 예쁜, and 큰 to modify what follows. When making actual sentences, it is more straightforward to identify the position first and then work out the present, past, or connective form than to memorize every form as one large set. You can then practice 「-고」and 「-았/었어요」with the same words—for example, comparing 「크고」and 「컸어요」—to see more clearly how the stem changes before different endings.
FAQs
Yes. Sentences such as 「날씨가 좋아요」 and 「방이 커요」 are completely natural. Once the adjective takes a sentence-final ending, it forms a complete sentence.
Because when 「예쁘다」 combines with 「-어요」, it contracts to 「예뻐요」. Since this is a high-frequency adjective, it is useful to learn the dictionary form and sentence-final form together.
「좋아요」appears at the end of a sentence and means that something is good, while 「좋은」appears before a noun and means “good …”. For example, 「날씨가 좋아요」 and 「좋은 날씨」 use the forms in different positions.
Yes. Both come from 「크다」. 「큰」is used to modify a noun, while 「커요」is used at the end of a sentence to describe a state.
It is used to describe a state that was true at a particular point in the past. For example, the weather yesterday, a room you used to live in, or your impression of a café you visited can all be described with past-tense adjective forms.