Grammar Rule in 30 Seconds
When a verb stem ends in '르', drop the 'ㅡ' and add a 'ㄹ' to the preceding syllable.
- If the vowel before '르' is 'ㅏ' or 'ㅗ', add '라' (e.g., 모르다 -> 몰라요).
- If the vowel before '르' is anything else, add '러' (e.g., 부르다 -> 불러요).
- The '르' syllable itself disappears, leaving the 'ㄹ' as a batchim for the previous syllable.
Overview
르-Irregular Conjugation Table
| Verb | Meaning | Stem | Polite (해요) |
|---|---|---|---|
|
모르다
|
To not know
|
모르
|
몰라요
|
|
부르다
|
To call/sing
|
부르
|
불러요
|
|
빠르다
|
To be fast
|
빠르
|
빨라요
|
|
기르다
|
To raise/grow
|
기르
|
길러요
|
|
다르다
|
To be different
|
다르
|
달라요
|
|
흐르다
|
To flow
|
흐르
|
흘러요
|
Meanings
A specific conjugation pattern for verbs ending in '르' where the 'ㅡ' vowel is dropped and a double 'ㄹ' sound is created.
Standard Conjugation
Applying the rule to present tense polite forms.
“빠르다 -> 빨라요”
“부르다 -> 불러요”
Reference Table
| 词典原形 | 非正式敬语 | 过去时 | 意思 |
|---|---|---|---|
|
`모르다`
|
`몰라요`
|
`몰랐어요`
|
不知道
|
|
`빠르다`
|
`빨라요`
|
`빨랐어요`
|
快
|
|
`다르다`
|
`달라요`
|
`달랐어요`
|
不同
|
|
`부르다`
|
`불러요`
|
`불렀어요`
|
叫 / 唱
|
|
`고르다`
|
`골라요`
|
`골랐어요`
|
挑选
|
|
`자르다`
|
`잘라요`
|
`잘랐어요`
|
剪 / 切
|
|
`기르다`
|
`길러요`
|
`길렀어요`
|
养 / 种植
|
正式程度
모릅니다. (General)
몰라요. (General)
몰라. (General)
몰라잉. (General)
核心 르 不规则动词
形容词
- 빠르다 快
- 다르다 不同
动词
- 모르다 不知道
- 부르다 叫/唱
- 고르다 挑选
辅音 vs 元音后缀
如何活用 르 动词
后缀是以元音开头的吗？
前一个元音是 ㅏ 或 ㅗ 吗？
是其他元音吗？
常用场景
购物/选择
- • 고르다 (挑选)
- • 다르다 (不同)
- • 자르다 (剪/切)
日常行为
- • 빠르다 (快)
- • 모르다 (不知道)
- • 부르다 (叫)
按水平分级的例句
저는 몰라요.
I don't know.
노래를 불러요.
I sing a song.
길이 빨라요.
The road is fast.
머리를 길러요.
I am growing my hair.
왜 몰라요?
Why don't you know?
친구가 노래를 불러요.
My friend is singing a song.
비행기가 빨라요.
The airplane is fast.
꽃을 길러요.
I am growing flowers.
그 사실을 몰랐어요.
I didn't know that fact.
이름을 불러주세요.
Please call my name.
인터넷이 정말 빨라요.
The internet is really fast.
강아지를 잘 길러요.
I raise the puppy well.
답을 몰라서 물어봤어요.
I didn't know the answer, so I asked.
가수를 불러서 공연해요.
We called a singer to perform.
일 처리가 빨라서 좋아요.
I like that the work processing is fast.
아이를 정성껏 길러요.
I raise the child with care.
아무것도 모르는 척하지 마세요.
Don't pretend you don't know anything.
이름을 크게 불러보세요.
Try calling the name loudly.
속도가 빨라야 해요.
The speed must be fast.
식물을 길러본 적이 없어요.
I have never tried growing plants.
그는 모든 것을 알고도 모르는 체했다.
He pretended not to know even though he knew everything.
그녀는 노래를 불러 분위기를 띄웠다.
She sang a song and lifted the mood.
변화가 빨라 적응하기 어렵다.
The change is fast, so it's hard to adapt.
그는 대대로 농사를 길러왔다.
He has been farming for generations.
容易混淆
Both involve the letter ㄹ, but ㄹ-irregular involves the stem-final ㄹ disappearing.
Both involve stem changes, but ㄷ-irregular changes ㄷ to ㄹ.
Learners often apply the 르-irregular to all verbs ending in 르.
常见错误
모르아요
몰라요
모라요
몰라요
부르아요
불러요
빠르아요
빨라요
다르아요
달라요
기르아요
길러요
흐르아요
흘러요
모르었어요
몰랐어요
부르었어요
불렀어요
빠르었어요
빨랐어요
모르는다
모른다
부르는다
부른다
빠르는다
빠르다
기르는다
기른다
句型
저는 ___를 몰라요.
친구가 노래를 ___.
인터넷이 너무 ___.
저는 꽃을 ___.
Real World Usage
몰라ㅋㅋ
인터넷 진짜 빨라!
잘 모르겠습니다.
이거 불러주세요.
길을 몰라요.
선생님, 몰라요.
“流动”的小窍门
别和普通的 ㅡ 变音搞混
ㅡ 结尾动词（如 '쓰다'）变音后是 «써요»。只有以 르 结尾的词才会触发双写 ㄹ 的规则。“Mollayo” 的语感
Smart Tips
Always check the preceding vowel first.
Focus on the double 'L' sound.
Double-check your spelling for the 'ㄹ' batchim.
Check if it ends in '르' in the dictionary.
发音
Double L
The double ㄹ is pronounced as a long, held 'L' sound.
Statement
몰라요 ↘
Neutral tone.
Question
몰라요 ↗
Inquisitive tone.
记住它
记忆技巧
Remember '르' is a 'Liar'—it hides its true self and turns into a double 'L' (ㄹㄹ).
视觉联想
Imagine a '르' character wearing a mask. When the '아/어' suffix comes, the mask falls off, and two 'L' shaped legs appear underneath.
Rhyme
If the vowel is A or O, use LA, if not, use LE, the 르 is gone, the L is here to stay.
Story
A man named 'Reu' was very shy. Whenever he met the '아/어' family, he would hide his 'ㅡ' face and grow two 'L' legs to run away. Now everyone calls him 'L-L' because of his new legs.
Word Web
挑战
Write down 5 sentences using different '르' verbs in the polite form within 5 minutes.
文化笔记
Using the correct irregular form is seen as a sign of basic fluency and respect for the language structure.
The rule is the same, but the vocabulary usage might differ slightly in formal contexts.
Fans often use the informal '몰라' when talking about idols or rumors.
The '르' irregular stems from historical vowel harmony patterns in Middle Korean.
对话开场白
길을 알아요?
노래를 불러줄 수 있어요?
인터넷이 빨라요?
강아지를 길러요?
日记主题
常见错误
Test Yourself
저는 그 사람을 ___.
같이 노래를 부러요.
颜色不一样。
Score: /3
练习题
8 exercises저는 길을 ___.
노래를 ___.
Find and fix the mistake:
인터넷이 빠르아요.
기르다 -> ?
흐르다
몰라요 / 저는 / 길을
르-irregular verbs always drop the ㅡ vowel.
A: 길을 알아요? B: 아니요, ___.
Score: /8
Practice Bank
10 exercises어제 선물을 ___.
길을 / 몰라요 / 저는
匹配对应项
识别规则动词。
太快了。
맛이 ___ 안 먹어요.
저는 그 사실을 몰릅니다.
동생을 / 불러요 / 제가
选择 '고르-' 的结尾。
我正在养猫。
Score: /10
常见问题 (8)
It's a phonological rule to make the word easier to say.
Only those ending in '르'.
These are very rare and usually not '르' irregulars.
Yes, but the formal '습니다' style doesn't use this rule.
Yes, but '모릅니다' is more formal.
Because of the double 'ㄹ' rule.
Check the vowel before '르'.
It takes practice, but it's very consistent.
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 structure.
Verb conjugation groups
French is suffix-based; Korean is stem-internal.
Strong verbs
German changes are often historical; Korean changes are phonological.
Godan verbs
Japanese is more predictable; Korean has specific irregular classes.
Weak verbs
Arabic is root-based; Korean is stem-based.
None
Chinese verbs never change form.
Learning Path
Prerequisites
Learn These First
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