Grammar Rule in 30 Seconds
When a verb stem ends in ㅂ, it 'melts' into 오 or 우 before adding a vowel-starting ending.
- If the vowel before ㅂ is ㅗ, change ㅂ to 오 (e.g., 돕다 -> 도와요).
- If the vowel before ㅂ is not ㅗ, change ㅂ to 우 (e.g., 춥다 -> 추워요).
- This rule applies to most adjectives and some verbs ending in ㅂ.
Overview
ㅂ不规则活用”。对于咱们中文母语者来说，这可能有点让人头疼，因为中文的动词和形容词是“恒定不变”的。无论后面接什么词，中文的“冷”永远是“冷”，不会因为后面接了别的词就变形成“凉”或者“冷呜”。但在韩语里，춥다（冷）在接上某些词尾时，必须变成추워요。这就像是一个“熔化”的过程，所以我们把它形象地称为“ㅂ熔化规则”。덥다（热）、춥다（冷）、맵다（辣）、어렵다（难）、쉽다（容易），全部都属于这个规则。如果你不知道这个规则，你在说“今天很冷”时，可能会错误地说成“춥어요”，这在韩国人听起来会非常别扭，就像外国人说中文说成“我冷是”一样。这个规则的本质是为了发音的流畅性。韩语是一种非常讲究“语音和谐”的语言，当ㅂ这个辅音夹在两个元音之间时，发音会变得很累，所以韩语通过把ㅂ变成半元音우或오来让发音更顺畅。这其实和中文里为了发音方便而产生的“变调”有异曲同工之妙，只是韩语变的是词尾的形态。ㅂ遇到以元音开头的词尾（比如아/어、으等）时，ㅂ就会“消失”并“熔化”为우或오。- 1词干（如
춥-）+ 词尾（如-어요） - 2这里的
ㅂ因为两边都是元音（或者即将变成元音环境），它觉得“站着”太累了，于是它软化成了우。 - 3
추+우+어요结合在一起，就变成了추워요。
ㅂ，你就要警惕它是否会发生变化。绝大多数情况下，ㅂ会变成우，只有极少数词（如돕다、곱다）会变成오。这其实是韩语古老的“元音和谐”遗迹，即阳性元音（아/오）对应阳性，阴性元音（어/우）对应阴性。虽然现在不需要背诵复杂的元音和谐规则，但记住돕다（帮助）变成도와요（阳性），而춥다（冷）变成추워요（阴性），能帮你快速掌握规律。저는 추워요 (춥+어+요) |매운 음식 (맵+은) |ㅂ变우；遇到辅音，原样不动”。춥다) |다 | 춥- |-어요 (元音) |ㅂ | 丢掉ㅂ，加上우 | 추 + 우 = 추우 |추우 + 어요 = 추워요 |-고、-지만、-습니다，则不需要变化。例如：춥고（冷而且...）、춥습니다（冷）。맵다（辣）和싱겁다（淡）。当你和朋友聊天抱怨天气，你需要用到덥다（热）和춥다（冷）。- 1描述天气与状态：这是最常用的场景。
날씨가 더워요（天气很热）。注意，如果你说날씨가 덥어요，韩国人会觉得你还在学韩语的初级阶段。 - 2描述口味：
이 김치는 매워요（这个泡菜很辣）。这是你在韩国生活必备的句子。 - 3表达感谢与礼貌：
고맙다（感谢）在口语中经常变成고마워요。这是你对帮助过你的人表达谢意时最常用的表达。 - 4描述难度：
한국어 공부가 어렵지만 재미있어요（韩语学习虽然难，但很有趣）。这里的어렵지만因为지만是以辅音开头，所以ㅂ没有变，这是非常经典的对比用法。
- 1过度泛化（Overgeneralization）：很多同学学会这个规则后，会把所有以
ㅂ结尾的词都改掉，比如입다（穿）变成이워요。这是错的！입다不是不规则动词，它是规则动词，应该说입어요。原因：母语者习惯寻找规律，一旦掌握了“ㅂ变우”，就想套用在所有词上，忽略了词汇本身的属性。 - 2辅音词尾也乱变：有些同学在接
-고或-습니다时，也把ㅂ改成了우，写成추우고或추우습니다。原因：受L1（中文）思维影响，中文没有词尾变化，所以对于“什么时候该变，什么时候不该变”的界限非常模糊，容易混淆。 - 3忽略
돕다的特殊性：习惯了춥다变추워요，看到돕다就想写成두워요。原因：这是因为춥다类词汇出现的频率远高于돕다，导致大脑形成了路径依赖，忽略了돕다属于特殊的“阳性”变体。
ㄷ不规则和ㅅ不规则。为了不混淆，请看下表：ㅂ不规则 | ㅂ → 우/오 | 춥다 → 추워요 |ㄷ不规则 | ㄷ → ㄹ | 듣다 → 들어요 |ㅅ不规则 | ㅅ → 脱落 | 낫다 → 나아요 |ㅂ不规则是“变元音”，ㄷ不规则是“变音节”，ㅅ不规则是“直接消失”。ㅂ结尾动词都是不规则的吗？잡다（抓）、입다（穿）、좁다（窄）都是规则动词，直接加아요/어요即可，分别是잡아요、입어요、좁아요。记住，不规则词汇是需要背诵的特殊群体。돕다要变오而不是우？돕다（帮助）的词干元音是오，属于阳性元音。为了保持语音和谐，它在变化时倾向于保留阳性色彩，所以变成了도와요。你可以把它记作“特例”。ㅂ不规则”时，就把它和추워요放在一起记忆。随着词汇量增加，你会产生语感，看到맵다自然就会联想到매워요。ㅂ-Irregular Conjugation Table
| Stem | Meaning | Polite (-아요/어요) | Past (-았/었어요) |
|---|---|---|---|
|
춥다
|
Cold
|
추워요
|
추웠어요
|
|
덥다
|
Hot
|
더워요
|
더웠어요
|
|
맵다
|
Spicy
|
매워요
|
매웠어요
|
|
어렵다
|
Difficult
|
어려워요
|
어려웠어요
|
|
돕다
|
Help
|
도와요
|
도왔어요
|
|
무겁다
|
Heavy
|
무거워요
|
무거웠어요
|
Meanings
This rule describes a sound-change phenomenon where the final consonant 'ㅂ' of a verb or adjective stem is replaced by '우' or '오' when followed by a vowel-initial suffix.
Adjective Conjugation
Used to describe states or qualities ending in ㅂ.
“날씨가 추워요.”
“가방이 무거워요.”
Verb Conjugation
Used for action verbs like 'to help' (돕다) or 'to comb' (곱다).
“친구를 도와요.”
“머리를 곱게 빗어요.”
Reference Table
| 形容词/动词 | 意思 | 礼貌体（现在时） | 礼貌体（过去时） |
|---|---|---|---|
|
덥다
|
热（天气）
|
더워요
|
더웠어요
|
|
춥다
|
冷（天气）
|
추워요
|
추웠어요
|
|
맵다
|
辣
|
매워요
|
매웠어요
|
|
귀엽다
|
可爱
|
귀여워요
|
귀여웠어요
|
|
어렵다
|
难
|
어려워요
|
어려웠어요
|
|
돕다
|
帮助
|
도와요
|
도왔어요
|
|
입다
|
穿（规则动词！）
|
입어요
|
입었어요
|
正式程度
춥습니다. (Weather)
추워요. (Weather)
추워. (Weather)
개추워. (Weather)
ㅂ 会“融化”吗？
动词是以 ㅂ 结尾吗？
它是规则动词吗 (입다, 잡다)？
词尾是以元音开头吗？
不规则 vs. 规则
“W”发音家族
标准 (우)
- 워 (wo) 大多数动词 (chup-da → chu-wo)
例外 (오)
- 와 (wa) 仅限 돕다 和 곱다 (dop-da → do-wa)
什么时候使用 ㅂ 动词
天气
- • 춥다 (冷)
- • 덥다 (热)
味道
- • 맵다 (辣)
- • 싱겁다 (淡)
感受
- • 반갑다 (高兴)
- • 고맙다 (谢谢)
难度
- • 어렵다 (难)
- • 쉽다 (易)
按水平分级的例句
날씨가 추워요.
The weather is cold.
도와주세요.
Please help me.
매워요.
It is spicy.
어려워요.
It is difficult.
이 가방은 너무 무거워요.
This bag is too heavy.
한국어 공부가 재미있지만 어려워요.
Korean study is fun but difficult.
친구가 저를 도와줬어요.
My friend helped me.
김치가 정말 매워요.
The kimchi is really spicy.
그 문제는 해결하기가 어려웠어요.
That problem was difficult to solve.
어제는 날씨가 더웠는데 오늘은 추워요.
Yesterday the weather was hot, but today it is cold.
도와주셔서 감사합니다.
Thank you for helping me.
이 길은 너무 좁아서 불편해요.
This road is too narrow, so it's uncomfortable.
그의 태도가 너무 차가워서 대화하기 어려웠습니다.
His attitude was so cold that it was difficult to talk.
매운 음식을 잘 못 먹어서 걱정이에요.
I'm worried because I can't eat spicy food well.
도와줄 수 있는 사람이 필요해요.
I need someone who can help.
그의 설명은 이해하기가 어려웠습니다.
His explanation was difficult to understand.
그는 어려운 상황에서도 항상 남을 도우려고 노력합니다.
He always tries to help others even in difficult situations.
이 문제는 매우 복잡하고 다루기가 어렵습니다.
This issue is very complex and difficult to handle.
날씨가 갑자기 추워져서 감기에 걸렸어요.
The weather suddenly turned cold, so I caught a cold.
그녀의 곱고 아름다운 목소리가 기억에 남습니다.
Her fine and beautiful voice remains in my memory.
그의 무거운 책임감은 모두가 인정하는 바입니다.
His heavy sense of responsibility is acknowledged by everyone.
도와주신 덕분에 무사히 마칠 수 있었습니다.
Thanks to your help, I was able to finish safely.
매운맛의 강도가 너무 높아서 먹기 힘들었습니다.
The intensity of the spiciness was too high, so it was hard to eat.
어려운 난관을 극복하는 과정이 중요합니다.
The process of overcoming difficult hurdles is important.
容易混淆
Learners often apply the rule to regular verbs like '잡다'.
Both involve consonant changes before vowels.
Both involve dropping a consonant.
常见错误
춥어요
추워요
돕어요
도와요
춥아
추워
매비요
매워요
춥지 않아요 (as 춥지 않워요)
춥지 않아요
입어요 (as 이워요)
입어요
어렵어요
어려워요
좁아요 (as 조와요)
좁아요
돕어서
도와서
덥어서
더워서
곱다 -> 고워요
고와요
잡다 -> 자워요
잡아요
뽑다 -> 뽀와요
뽑아요
句型
오늘 날씨가 ___.
이 음식은 ___.
한국어 공부가 ___.
친구가 저를 ___.
Real World Usage
오늘 서울은 추워요.
이거 너무 매워요.
도와줘!
이 문제가 어려워요.
어려운 상황을 극복했습니다.
가방이 무거워요.
“Oh”例外
遇到辅音不“融化”
可爱发音
Smart Tips
Check if it's an adjective. If yes, it's 90% likely to be irregular.
Remember it's the 'O' exception.
Don't melt the ㅂ!
Don't apply the rule.
发音
ㅂ-Melting
The ㅂ sound is replaced by a /w/ glide, making the transition to the next vowel smooth.
Statement
추워요 ↘
Neutral declarative statement.
Question
추워요 ↗
Polite inquiry.
记住它
记忆技巧
Think of the ㅂ as a block of ice. When it hits the 'warm' vowel endings, it melts into a puddle (우 or 오).
视觉联想
Imagine a snowman (춥다) standing in the sun. As he gets closer to the sun (the vowel ending), he melts into a puddle of water (워).
Rhyme
If the vowel is O, use WA, if not, use WO, away goes the B, watch the verb grow!
Story
A spicy (맵다) pepper was sitting on a cold (춥다) table. He wanted to help (돕다) the chef. He jumped into the pot, and because of the heat, he melted into the soup.
Word Web
挑战
Write 5 sentences using 5 different ㅂ-irregular adjectives in the present tense.
文化笔记
The word '맵다' (spicy) is central to Korean food culture. You will hear it in every restaurant.
Young people often add '개' or '핵' before these adjectives to emphasize them.
In business, you must use the formal -습니다 form, where the ㅂ-irregular rule still applies.
The ㅂ-irregular rule stems from the historical loss of labial consonants in certain positions.
对话开场白
오늘 날씨가 어때요?
이 음식 매워요?
한국어 공부가 어때요?
도와줄 수 있어요?
日记主题
常见错误
Test Yourself
오늘 날씨가 너무 ___ (춥다).
Find and fix the mistake:
이 음식은 너무 맵어요.
The movie is easy.
Answer starts with: 영화가...
Score: /3
练习题
8 exercises날씨가 ___.
이 음식은 ___.
Find and fix the mistake:
돕어요.
가방이 / 무거워요 / 너무
It is difficult.
1. 춥다 2. 돕다
오늘 ___.
날씨 / 춥다 / -어서 / 집에 가요
Score: /8
Practice Bank
11 exercises여름은 ___ (덥다).
选择其中的例外。
저를 도워주세요.
匹配对应项。
It was difficult.
가방이 / 무거워요 / 너무
김치가 너무 ___ (맵다 - Past Tense).
对亲近的朋友说：___ (고맙다).
코트를 이워요.
Is it spicy?
시험이 ___ (쉽다) 좋겠어요.
Score: /11
常见问题 (8)
It is a historical exception where the stem vowel '오' causes the '와요' ending.
No, verbs like '입다' (to wear) are regular.
The ㅂ remains because -고 starts with a consonant.
Yes, it is standard in all forms of writing.
Most descriptive verbs (adjectives) ending in ㅂ are irregular.
Yes, the rule applies to all politeness levels.
It's a metaphor for the ㅂ disappearing into the vowel.
Use -워요.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Stem-changing verbs
Spanish changes the vowel; Korean changes the consonant.
Liaison
Liaison is about sound flow, not irregular conjugation.
Strong verbs
German is vowel-based; Korean is consonant-based.
Godan verbs
Japanese doesn't have this specific 'melting' rule.
Weak roots
Arabic is root-based; Korean is stem-based.
None
Chinese verbs are invariant.
Learning Path
Prerequisites
Learn These First
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