Korean Vowel Contractions: Speak Like a Native (모음 축약)
Grammar Rule in 30 Seconds
When two vowels meet in Korean, they often merge into one sound to make speaking faster and smoother.
- ㅏ + ㅏ = ㅘ (e.g., 가 + 아 = 가)
- ㅗ + ㅏ = ㅘ (e.g., 오 + 아 = 와)
- ㅜ + ㅓ = ㅝ (e.g., 주 + 어 = 줘)
Overview
Vowel contractions, known in Korean as 모음 축약 (mo-eum chuk-yak, 母音 縮約), represent a fundamental phonological process crucial for achieving natural, fluid Korean speech. This phenomenon primarily occurs when a verb or adjective stem, ending in a vowel without a final consonant (받침, batchim), immediately precedes a vowel-initial grammatical ending like the polite informal present tense -아요/어요. Its purpose is to resolve hiatus, the phonetic awkwardness of two distinct vowel sounds occurring consecutively, by merging or blending them into a single, more efficient sound unit.
For A1 learners, understanding 모음 축약 is not optional; it is essential. While initial learning might involve mechanically attaching -아요 or -어요, native speakers consistently contract these forms. Neglecting contractions results in speech that sounds stiff, overly formal, and distinctly non-native.
Mastering these contractions marks a significant step towards authentic communication and comprehension in Korean.
Conjugation Table
| Stem's Final Vowel | Ending Choice | Combined Form | Contraction Rule (Phonological Basis) | Example Verb (다-form) |
Stem | Base Conjugation (-아요/어요) |
Contracted Form | Romanization | Translation | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| :------------------- | :-------------- | :-------------- | :------------------------------------ | :------------------------- | :----- | :--------------------------------- | :--------------- | :------------- | :------------ | ||
| ㅏ | -아요 |
ㅏ + 아 -> ㅏ |
Coalescence of identical vowels. | 가다 (to go) |
가 |
가아요 |
가요 |
ga-yo |
I go / Going | ||
| ㅓ | -어요 |
ㅓ + 어 -> ㅓ |
Coalescence of identical vowels. | 서다 (to stand) |
서 |
서어요 |
서요 |
seo-yo |
I stand / Standing | ||
| ㅗ | -아요 |
ㅗ + 아 -> ㅘ |
Diphthongization (labial-velar glide). | 오다 (to come) |
오 |
오아요 |
와요 |
wa-yo |
I come / Coming | ||
| ㅜ | -어요 |
ㅜ + 어 -> ㅝ |
Diphthongization (labial-velar glide). | 주다 (to give) |
주 |
주어요 |
줘요 |
jwo-yo |
I give / Giving | ||
| ㅣ | -어요 |
ㅣ + 어 -> ㅕ |
Diphthongization (palatal glide). | 마시다 (to drink) |
마시 |
마시어요 |
마셔요 |
ma-syeo-yo |
I drink / Drinking | ||
| ㅐ | -어요 |
ㅐ + 어 -> ㅐ |
Coalescence of similar vowels. | 지내다 (to spend time) |
지내 |
지내어요 |
지내요 |
ji-nae-yo |
I spend time / Doing well | ||
| ㅔ | -어요 |
ㅔ + 어 -> ㅔ |
Coalescence of similar vowels. | 보내다 (to send) |
보내 |
보내어요 |
보내요 |
bo-nae-yo |
I send / Sending | ||
| ㅚ | -아요 |
ㅚ + 아 -> ㅙ |
Diphthongization. | 되다 (to become) |
되 |
되어요 |
돼요 |
dwae-yo |
I become / Becoming | ||
| 하다 | -어요 |
하 + 여 -> 해 |
Historical contraction of 하여. |
하다 (to do) |
하 |
하어요 (historically 하여요) |
해요 |
hae-yo |
I do / Doing |
How This Grammar Works
해요체 conjugation.- 1Initial Vowel Harmony Selection: First, the appropriate polite informal ending is chosen. If the stem's final vowel is
ㅏorㅗ, you attach-아요. For all other vowels, you attach-어요. This initial choice dictates the subsequent vowel interaction. - 2Absence of
받침: Contraction occurs exclusively when the verb or adjective stem ends in a vowel and lacks a final consonant (받침). A받침acts as a phonetic barrier, preventing the stem's final vowel from merging with the ending's initial vowel. For example,읽다(to read) becomes읽어요; theㄹㄱ받침prevents any contraction. - 3Vowel Interaction Types: Once conditions are met, the adjacent vowels interact in one of two primary ways:
- Coalescence (Merging): When the stem's final vowel and the ending's initial vowel are identical, one vowel is absorbed into the other. This reduces phonetic redundancy. For instance,
가+아요(ㅏ+아) results in가요(ㅏ), where the secondㅏmerges into the first. Similarly,서+어요(ㅓ+어) becomes서요(ㅓ). - Diphthongization (Blending): When the vowels are distinct but phonetically compatible, they blend to form a diphthong, a single complex vowel sound. This creates a smoother glide between the original vowel positions. Key patterns include:
ㅗ+아→ㅘ(wa), as in오다(to come) →오아요→와요.ㅜ+어→ㅝ(wo), as in주다(to give) →주어요→줘요.ㅣ+어→ㅕ(yeo), as in마시다(to drink) →마시어요→마셔요.
- 1Special Case:
하다Verbs: The verb하다(to do) and all verbs ending in-하다follow a unique historical contraction. Originally,하would combine with-여요(a historical variant of-어요), forming하여요. Over time,하여phonetically contracted to해. Therefore,하다verbs invariably contract to해요, regardless of the preceding syllables (e.g.,공부하다→공부해요,운동하다→운동해요). This consistent contraction underscores its integral role in modern Korean.
모음 축약 a cornerstone of spoken Korean.Formation Pattern
다 from the word. This yields the stem.
보다 (to see) → 보
만들다 (to make) → 만들
하다 (to do) → 하
받침): Examine the last syllable of the identified stem.
받침): No contraction occurs. The 받침 prevents the vowels from merging. Simply attach -아요 or -어요 based on the stem's preceding vowel (ㅏ or ㅗ with -아요; others with -어요).
먹다 (to eat) → Stem 먹 (ends in ㄱ). The verb becomes 먹어요 (meog-eo-yo).
앉다 (to sit) → Stem 앉 (ends in ㄴㅈ). The verb becomes 앉아요 (an-ja-yo).
받침): Contraction is typically mandatory. Proceed to Step 3.
오다 (to come) → Stem 오 (ends in ㅗ, no 받침).
-아요 or -어요): Based on the last vowel of the stem (if no 받침), select the appropriate ending according to vowel harmony:
ㅏ or ㅗ, add -아요.
ㅓ, ㅜ, ㅣ, ㅐ, ㅔ, ㅚ, ㅟ), add -어요.
하 (as in 하다 verbs), this is a special case resulting in 해요. Treat it distinctly.
ㅏ-ending stems + -아요: The second ㅏ merges into the stem's ㅏ. Visually, the form appears as the stem plus 요. (가 + 아요 → 가요 ga-yo)
ㅓ-ending stems + -어요: The second ㅓ merges into the stem's ㅓ. Visually, the form appears as the stem plus 요. (서 + 어요 → 서요 seo-yo)
ㅗ-ending stems + -아요: The ㅗ of the stem blends with the ㅏ of -아요 to form ㅘ. (오 + 아요 → 와요 wa-yo)
ㅜ-ending stems + -어요: The ㅜ of the stem blends with the ㅓ of -어요 to form ㅝ. (주 + 어요 → 줘요 jwo-yo)
ㅣ-ending stems + -어요: The ㅣ of the stem blends with the ㅓ of -어요 to form ㅕ. (마시 + 어요 → 마셔요 ma-syeo-yo)
ㅐ, ㅔ-ending stems + -어요: The ㅓ from -어요 merges into the stem's ㅐ or ㅔ. Visually, the form appears as the stem plus 요. (지내 + 어요 → 지내요 ji-nae-yo)
ㅚ-ending stems + -아요: The ㅚ of the stem blends with the ㅏ of -아요 to form ㅙ. (되 + 어요 → 돼요 dwae-yo)
하다 verbs: Always contract 하 to 해 before 요. (공부하다 → 공부하 + 어요 → 공부해요 gong-bu-hae-yo)
When To Use It
해요체) and the aforementioned conditions (vowel-ending stem, no 받침) are met. These forms are not stylistic choices; they are the standard and expected method of expression in nearly all daily contexts.- Daily Conversations: In virtually any polite, informal interaction—with friends, family, colleagues, or acquaintances—contractions are indispensable for natural speech. Failing to contract will make your speech sound awkward or stiff. For example,
어디에 가요?(eo-di-e ga-yo?, Where are you going?) is standard, not어디에 가아요? - Digital Communication: Texting, instant messaging (e.g., KakaoTalk), and social media inherently use contracted forms. Uncontracted forms in these contexts appear excessively formal or machine-generated.
지금 와요?(ji-geum wa-yo?, Are you coming now?) is standard, replacing지금 오아요? - Informal Media: Vlogs, online lectures, podcasts, or any content aimed at a general audience in a relaxed yet respectful tone will utilize
해요체with contractions. A vlogger might say,오늘 저는 한국어를 배워요.(o-neul jeo-neun han-gu-geo-reul bae-wo-yo., Today, I'm learning Korean.) - Asking and Answering Present Tense Questions: When formulating present tense statements or questions in polite informal speech, these contractions are consistently applied. For instance,
커피를 마셔요?(keo-pi-reul ma-syeo-yo?, Do you drink coffee?) is the natural form from마시다.
해요체 and the verb or adjective stem ends in a vowel without a 받침, the contracted form is the default and expected usage. Mastery here is crucial for both intelligibility and native-like fluency.When Not To Use It
- Verbs/Adjectives with a Final Consonant (
받침): This is the cardinal rule. If the verb or adjective stem possesses a받침, no vowel contraction can occur. The consonant physically separates the stem's final vowel from the ending's initial vowel, preventing any merger or blending. - Example:
먹다(to eat) → Stem먹(ends inㄱ). It becomes먹어요(meog-eo-yo), not머거요. - Example:
읽다(to read) → Stem읽(ends inㄺ). It becomes읽어요(il-geoyo), not일거요. - Example:
있다(to be, to have) → Stem있(ends inㅆ). It becomes있어요(iss-eo-yo), not이써요. - Rule: Always maintain the
받침intact and attach-아요or-어요based on the stem's preceding vowel. Forㅏorㅗin the last vowel of the stem, use-아요(e.g.,앉다→앉아요). For all others, use-어요. - Formal Polite Speech (
-습니다/-ㅂ니다): The formal polite style (합니다체,ham-ni-da-che) employs endings like-습니다(for consonant-ending stems) or-ㅂ니다(for vowel-ending stems). These endings do not begin with a vowel, thus they inherently preclude any vowel contraction.가다(to go) becomes갑니다(gap-ni-da),먹다(to eat) becomes먹습니다(meok-seup-ni-da), and하다(to do) becomes합니다(ham-ni-da). - Other Grammatical Endings: Numerous other Korean grammatical endings do not trigger vowel contractions because they either begin with a consonant, have a different morphological structure, or are simply not prone to such phonetic mergers. Examples include future tense (
-ㄹ/을 거예요), desire (-고 싶다), and connective endings (-고,-지만).가다(to go) would be갈 거예요(gal geo-ye-yo, I will go), not가ㄹ거예요. - Highly Literary or Archaic Contexts: While historically certain uncontracted forms (e.g.,
보아요instead of봐요) existed, they are virtually absent in modern usage. Encountering them today typically signifies archaic text, poetry, or a deliberate, unusual stylistic choice. For A1 learners, prioritizing contracted forms in all relevant contexts is the correct approach.
Common Mistakes
- Failure to Contract (Over-conjugating): A predominant initial error involves adding
-아요/어요without performing the necessary vowel merger, resulting in forms like오아요(o-a-yo) instead of와요(wa-yo), or마시어요(ma-si-eo-yo) instead of마셔요(ma-syeo-yo). This often stems from applying a direct, mechanical suffixation rule. The issue is phonetic: these uncontracted forms violate the natural phonological drive for efficiency in Korean, making them sound unnatural and effortful to native speakers. - Ignoring the Special
하다Rule: Learners often attempt to apply standard vowel contraction rules to하다verbs (e.g.,공부하다,운동하다), incorrectly producing forms such as공부하어요(gong-bu-ha-eo-yo) or운동하아요(un-dong-ha-a-yo). The immutable rule is that하always contracts to해when followed by the appropriate vowel-initial ending (historically-여요). Consequently,공부해요(gong-bu-hae-yo, I study) and운동해요(un-dong-hae-yo, I exercise) are the only natural and correct forms. This is a non-negotiable historical exception. - Attempting Contraction with
받침Verbs: This indicates a fundamental misunderstanding of the prerequisite conditions for contraction. A stem with a받침(final consonant) acts as a barrier, physically preventing the merging of the stem's vowel with the ending's vowel. Learners might incorrectly try to contract앉다(to sit) from앉아요(an-ja-yo) to안져요(an-jyeo-yo) or읽다(to read) from읽어요(il-geoyo) to일거요(il-geoyo). Remember: if a받침is present, no vowel contraction occurs. - Confusing Diphthong Formations: While both
ㅗandㅜstems create diphthongs, misidentifyingㅘ(fromㅗ + 아) versusㅝ(fromㅜ + 어) is common. For example, incorrectly conjugating주다(to give) with-아요to form좌요(jwa-yo) instead of the correct줘요(jwo-yo) (from주 + 어요). Similarly,보다(to see) must become봐요(bwa-yo) (from보 + 아요), not뵈요(boe-yo). Strict adherence to vowel harmony is necessary to correctly predict the resulting diphthong. - Overgeneralizing or Misapplying Contractions: Sometimes, learners mistakenly apply contraction rules to other vowel-related phenomena that are distinct. For instance,
아파요(a-pa-yo, It hurts/I'm sick) derives from아프다(a-peu-da) viaㅡvowel deletion (ㅡ 탈락), not vowel contraction. While both involve vowel changes, their underlying phonological rules are different. Always verify the specific conditions for모음 축약before applying.
Memory Trick
To internalize Korean vowel contractions, conceptualize the vowels as participants in a phonetic dance, aiming for the most fluid, efficient movement, especially when no 받침 interferes. This mnemonic categorizes their interactions:
- The Absorbers (ㅏ, ㅓ, ㅐ, ㅔ): These vowels are so similar to their -아요 or -어요 partners that the incoming vowel is simply absorbed. It's an act of phonetic self-absorption. The second vowel disappears without a trace because it is redundant. Think: Identical or similar vowels merge into one.
- 가 + 아요 → 가요 (ga-yo)
- 서 + 어요 → 서요 (seo-yo)
- 지내 + 어요 → 지내요 (ji-nae-yo)
- The Blenders (ㅗ, ㅜ, ㅣ): These vowels are distinct but compatible with their partners, blending to create a new, combined diphthong. It's like mixing two colors to form a new shade.
- ㅗ + ㅏ → ㅘ (wa): Think 'o' meets 'a', becomes 'wa'. (오 + 아요 → 와요)
- ㅜ + ㅓ → ㅝ (wo): Think 'oo' meets 'eo', becomes 'wo'. (주 + 어요 → 줘요)
- ㅣ + ㅓ → ㅕ (yeo): Think 'ee' meets 'eo', becomes 'yeo'. (마시 + 어요 → 마셔요)
- The Historical Exception (하): 하 stands apart. It does not follow the standard blending or merging rules. Its transformation to 해 is a result of historical sound change. Think: 하 always becomes 해 (historically 하여 → 해). (공부하다 → 공부해요)
- The Barrier (받침): Imagine a final consonant (받침) as a physical wall between the verb stem's vowel and the ending's initial vowel. They cannot reach each other to contract. Think: 받침 builds a wall, blocking contraction. (먹다 → 먹어요, no contraction)
By associating each interaction type with these distinct concepts, you can transform rote memorization into an intuitive pattern recognition process, accelerating your mastery.
Real Conversations
Vowel contractions are integral to the cadence and flow of everyday Korean. They are not optional but essential for sounding natural and being understood. The following examples demonstrate their ubiquitous use across various communicative contexts.
Scenario 1
- You: 오늘 저녁에 뭐 해요? (o-neul jeo-nyeok-e mwo hae-yo?, What are you doing tonight?)
- Analysis: From 하다 (to do) → 해요. Essential for inquiring about activities.
- Friend: 음... 아직 아무것도 안 정했어요. 왜요? (eum... a-jik a-mu-geot-do an jeong-hae-sseo-yo. wae-yo?, Hmm... I haven't decided anything yet. Why?)
- Analysis: From 정하다 (to decide) → 정해요. The contraction also applies to past tense (정하 + 였어요 → 정했어요).
Scenario 2
- You: 이 옷 너무 예뻐 보여요! (i ot neo-mu ye-ppeo bo-yeo-yo!, This clothing looks so pretty!)
- Analysis: From 보이다 (to be seen, to look) → 보이 + 어요 → 보여요. A common compliment structure.
- Salesperson: 네, 잘 어울려요. 한번 입어봐요! (ne, jal eo-ul-lyeo-yo. han-beon i-beo-bwa-yo!, Yes, it suits you well. Try it on!)
- Analysis: 어울리다 (to suit) → 어울리 + 어요 → 어울려요. 입어보다 (to try on) → 입어보 + 아요 → 입어봐요.
Scenario 3
- Caption: 오늘 날씨가 정말 좋아요! 한강에서 자전거 타요. (o-neul nal-ssi-ga jeong-mal jo-a-yo! han-gang-e-seo ja-jeon-geo ta-yo., The weather is really good today! I'm riding a bike by the Han River.)
- Analysis: 좋다 (to be good) → 좋아요 (here, ㅎ irregular applies, not a direct vowel contraction). 타다 (to ride) → 타 + 아요 → 타요. This demonstrates contractions in concise, natural online communication.
These examples confirm that mastery of vowel contractions is not merely a grammatical exercise but a prerequisite for engaging authentically in Korean speech and informal writing.
Contrast With Similar Patterns
모음 축약 specifically deals with vowel-to-vowel mergers, it is crucial to distinguish it from other similar-looking phenomena to avoid confusion.- 1
ㅡVowel Deletion (ㅡ 탈락,eu tal-lak) vs. Vowel Contraction:
- Vowel Contraction: Involves two distinct vowels merging or blending to form a new single vowel sound or diphthong (e.g.,
오+아→와). The original vowel sounds contribute to the new sound. ㅡVowel Deletion: Occurs when a stem ending in the vowelㅡis followed by a vowel-initial ending. Theㅡsimply disappears, and the ending attaches directly to the remaining syllable. This is a deletion, not a merger.- Example:
쓰다(to write/use) → Stem쓰. Sinceㅡis the stem vowel and is notㅏorㅗ, it combines with-어요. Theㅡdrops:쓰+어요→써요(sseo-yo). - Example:
아프다(to be sick) → Stem아프. Theㅡdrops, and프combines with-어요to become파요:아프+어요→아파요(a-pa-yo). - Key Difference:
ㅡdeletion removes a vowel entirely; vowel contraction transforms two vowels into one complex sound.
- 1
ㅎIrregular Verbs/Adjectives (ㅎ 불규칙,hieut bul-gyu-chik) vs. Vowel Contraction:
- Vowel Contraction: Applies to stems that already end in a vowel.
ㅎIrregular Verbs/Adjectives: These are adjectives that end in theㅎ받침(e.g.,빨갛다(to be red),좋다(to be good)). When followed by a vowel-initial ending like-아요/어요, theㅎ받침often drops, and the preceding vowel (typicallyㅏorㅐbeforeㅎ) interacts with the ending's vowel in a specific way, frequently resulting inㅐ. This is a process of consonant deletion and subsequent vowel modification.- Example:
빨갛다→빨갛+아요→ Theㅎdrops,ㅏand아combine to formㅐ:빨개요(ppal-gae-yo). - Example:
좋다→좋+아요→ Theㅎis often silent or drops, and theㅗcombines with-아요without forming a diphthong:좋아요(jo-a-yo). (Here, the phonetic change is primarily theㅎdropping, not vowel blending). - Key Difference:
ㅎirregulars involve a consonant's modification or deletion, then subsequent vowel interaction. Vowel contraction involves two existing vowels merging without a consonant's direct involvement.
- 1Past Tense (
-았/었/였어요) with Vowel Contraction: The principle of vowel contraction extends to past tense formation because the past tense endings-았/었/였어요also begin with vowels. The selection of-았or-었follows the same vowel harmony rules as-아요/어요.
- If the stem ends in
ㅏorㅗ, use-았어요. - For other vowels, use
-었어요. 하다verbs always use-였어요(which contracts to했어요).- The same contraction rules apply:
가다→가+았어요→갔어요(ga-sseo-yo).오다→오+았어요→왔어요(wa-sseo-yo).주다→주+었어요→줬어요(jwo-sseo-yo).하다→하+였어요→했어요(hae-sseo-yo).- Key Similarity: The underlying phonological drive for efficiency and the specific vowel merger/blending rules are identical, making present tense mastery directly transferable to past tense contractions.
Progressive Practice
Mastering vowel contractions requires a structured, progressive approach. This practice plan moves from basic recognition to active, spontaneous application, designed to integrate contractions into your natural Korean usage.
Level 1: Basic Absorption (ㅏ, ㅓ Stems)
Focus on stems where -아요/어요 merges with an identical stem vowel, often appearing visually as if the ending vowel disappeared. This simplifies initial recognition.
- Task: Conjugate 자다 (to sleep), 타다 (to ride), 서다 (to stand), 크다 (to be big) to 해요체.
- Expected Outcome: 자요 (ja-yo), 타요 (ta-yo), 서요 (seo-yo), 커요 (keo-yo). (Note 커요 involves ㅡ deletion then ㅓ merger).
- Practice: Read simple sentences aloud, consciously producing the contracted forms. Example: 저는 의자에 서요. (jeo-neun ui-ja-e seo-yo., I stand on the chair.)
Level 2: Diphthong Formation (ㅗ, ㅜ Stems)
Transition to stems that form diphthongs, involving a more noticeable visual and phonetic transformation. This level focuses on ㅗ and ㅜ combining with their respective ending vowels.
- Task: Conjugate 오다 (to come), 보다 (to see), 주다 (to give), 배우다 (to learn) to 해요체.
- Expected Outcome: 와요 (wa-yo), 봐요 (bwa-yo), 줘요 (jwo-yo), 배워요 (bae-wo-yo).
- Practice: Construct and speak short sentences. Example: 친구가 지금 와요. (chin-gu-ga ji-geum wa-yo., My friend is coming now.)
Level 3: ㅣ to ㅕ Transformation (ㅣ Stems)
This contraction is often distinct due to ㅣ and ㅓ creating a ㅕ sound. Dedicate focused attention to these verbs.
- Task: Conjugate 마시다 (to drink), 기다리다 (to wait), 가르치다 (to teach) to 해요체.
- Expected Outcome: 마셔요 (ma-syeo-yo), 기다려요 (gi-da-ryeo-yo), 가르쳐요 (ga-reu-chyeo-yo).
- Practice: Use these verbs in question-and-answer pairs. Example: 커피 마셔요? (keo-pi ma-syeo-yo?, Do you drink coffee?) 네, 마셔요. (ne, ma-syeo-yo., Yes, I drink it.)
Level 4: Mastering the 하다 Verbs
Practice extensively with various 하다 verbs until the 해 contraction becomes automatic. This is crucial due to the high frequency of these verbs.
- Task: Conjugate 공부하다 (to study), 운동하다 (to exercise), 요리하다 (to cook), 말하다 (to speak) to 해요체.
- Expected Outcome: 공부해요 (gong-bu-hae-yo), 운동해요 (un-dong-hae-yo), 요리해요 (yo-ri-hae-yo), 말해요 (mal-hae-yo).
- Practice: Describe your daily routine using several 하다 verbs. Example: 저는 매일 한국어를 공부해요. (jeo-neun mae-il han-gu-geo-reul gong-bu-hae-yo., I study Korean every day.)
Level 5: Comprehensive Application & Auditory Practice
Integrate all rules, including recognizing 받침 verbs that do not contract. Actively listen for and produce contractions spontaneously.
- Task: Listen to Korean native speakers (K-pop, dramas, YouTube). Identify 5-10 contracted verbs/adjectives, write down their dictionary forms, and explain the contraction rule applied.
- Task: Translate short English sentences into Korean, forcing yourself to apply contractions where appropriate, and identifying where no contraction occurs.
- Task: Engage in short conversations with a language partner or record yourself speaking, focusing on the natural rhythm and correct application of contractions.
Quick FAQ
- Are uncontracted forms (e.g.,
가아요,오아요) ever considered correct or used by natives? - Grammatically, they are often derived correctly, but phonologically, they sound extremely unnatural and archaic in modern speech. Native speakers almost universally use the contracted forms. In very rare, highly formal, or poetic contexts, uncontracted forms might appear, but for A1 learners, they should be avoided.
- Do vowel contractions apply to other grammatical endings besides
-아요/어요and past tense-았/었/였어요? - Yes, the general principle applies to any vowel-ending stem followed by a vowel-initial ending that allows for such a merger. However,
-아요/어요and the past tense forms are the most common and systematic instances you will encounter as a beginner. Other endings might have different rules or not permit contractions. - Is there a universal phonetic principle that explains all Korean vowel mergers?
- While
phonological economyandhiatus avoidanceare general principles, the specific outcomes (coalescence, diphthongization, or specialized historical contractions like하다→해) are particular to Korean phonology. The rules provided are specific to how these vowels interact in Korean. - How do these contractions interact with other irregular verb conjugations?
- Vowel contractions are a distinct phenomenon from most irregular conjugations (e.g.,
ㄷirregular,ㅂirregular,르irregular). These irregulars change the stem itself before모음 축약or other vowel-initial endings apply. For example,듣다(deud-da, to listen) becomes들어요(deul-eo-yo) (ㄷirregular) where들then takes-어요without further contraction. Theㅡdeletion andㅎirregulars (as discussed in 'Contrast With Similar Patterns') are the closest related processes because they also involve vowel-initial endings.
Vowel Contraction Rules
| Stem Vowel | Suffix | Result | Example |
|---|---|---|---|
|
ㅏ
|
아
|
ㅏ
|
가다 -> 가요
|
|
ㅗ
|
아
|
ㅘ
|
오다 -> 와요
|
|
ㅜ
|
어
|
ㅝ
|
주다 -> 줘요
|
|
ㅣ
|
어
|
ㅕ
|
기다리다 -> 기다려요
|
|
ㅐ
|
어
|
ㅐ
|
매다 -> 매요
|
|
ㅔ
|
어
|
ㅔ
|
세다 -> 세요
|
Common Contractions
| Full Form | Contracted Form |
|---|---|
|
보아
|
봐
|
|
주어
|
줘
|
|
되어
|
돼
|
|
하여
|
해
|
Meanings
Vowel contraction occurs when two adjacent vowels merge into a single syllable or a combined vowel sound during conjugation.
Basic Contraction
Merging of stem-final vowels with conjugation suffixes.
“가요”
“와요”
Double Vowel Merging
Merging of two distinct vowels into a diphthong.
“보 + 아 = 봐”
“주 + 어 = 줘”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Stem + Ending
|
가요
|
|
Negative
|
Stem + 지 않다
|
가지 않아요
|
|
Question
|
Stem + Ending?
|
가요?
|
|
Past
|
Stem + 았/었
|
갔어요
|
|
Polite
|
Stem + 세요
|
가세요
|
|
Casual
|
Stem + 아/어
|
가
|
Formality Spectrum
갑니다. (Daily movement)
가요. (Daily movement)
가. (Daily movement)
가네. (Daily movement)
Vowel Merging Map
ㅏ+아
- 가 go
ㅗ+아
- 와 come
ㅜ+어
- 줘 give
Examples by Level
저는 학교에 가요.
I go to school.
커피를 주세요.
Please give me coffee.
영화를 봐요.
I watch a movie.
여기에 와요.
Come here.
숙제를 해요.
I do homework.
문을 열어줘요.
Please open the door for me.
사과를 깎아요.
I peel the apple.
노래를 불러요.
I sing a song.
그것은 안 돼요.
That is not allowed.
친구를 기다려요.
I am waiting for a friend.
옷을 입혀요.
I dress (someone).
마음을 비워요.
I clear my mind.
그 일을 다 해냈어요.
I finished that work.
그는 나를 속였어요.
He deceived me.
문제를 해결해요.
I solve the problem.
그것을 배워요.
I learn that.
그는 나를 꾀어냈어요.
He lured me out.
그것은 오해예요.
That is a misunderstanding.
그는 나를 쏘아봤어요.
He glared at me.
그것을 꼬아놨어요.
He twisted it up.
그는 나를 옭아맸어요.
He ensnared me.
그것을 핥아먹어요.
I lick it up.
그는 나를 갉아먹어요.
He is gnawing at me.
그것을 틔워내요.
I sprout it.
Easily Confused
Learners think irregular changes are contractions.
Mixing up vowel contraction with particle merging.
Mixing up present and past contractions.
Common Mistakes
가아요
가요
오아요
와요
주어요
줘요
하아요
해요
보아요
봐요
되어요
돼요
기다리아요
기다려요
마시어요
마셔요
쓰어요
써요
크어요
커요
쏘아보아요
쏘아봐요
꾀어내어요
꾀어내요
핥아먹어요
핥아먹어요
Sentence Patterns
저는 ___에 가요.
영화를 ___.
커피를 ___.
숙제를 ___.
Real World Usage
뭐 해?
이거 주세요.
열심히 하겠습니다.
영화 봐요!
어디로 가요?
주문해요.
Listen to the rhythm
Watch the stem
Use flashcards
Be polite
Smart Tips
Always check if they can merge.
Remember it always becomes 해요.
It almost always becomes ㅘ.
It almost always becomes ㅝ.
Pronunciation
Diphthong formation
The two vowels are pronounced as one single, gliding sound.
Statement
가요 ↓
Falling intonation for declarative sentences.
Memorize It
Mnemonic
Think of vowels as magnets; if they are the same polarity, they snap together.
Visual Association
Imagine two puzzle pieces with vowel shapes sliding into each other to form one perfect square.
Rhyme
Vowels meet and start to play, merge together, hip-hooray!
Story
Mr. A and Mr. A were walking. They bumped into each other and became one big Mr. A. Then Mr. O met Mr. A and they danced into a 'Wa' shape. Now they are a happy, shorter family.
Word Web
Challenge
Write 5 sentences using different verbs and apply the contraction rule for each.
Cultural Notes
Contractions are the hallmark of the Seoul dialect.
Busan dialect often keeps vowels slightly longer.
Jeju dialect has unique vowel shifts.
Contractions evolved from the need for faster speech in the Joseon Dynasty.
Conversation Starters
어디에 가요?
무엇을 봐요?
커피를 줘요?
숙제를 해요?
Journal Prompts
Common Mistakes
Test Yourself
저는 학교에 ___.
오다 + 아요 = ?
Find and fix the mistake:
주어요 -> ?
보다 -> ?
Contractions are optional.
A: 어디 가요? B: 집에 ___.
커피 / 주다 / polite
Which uses ㅘ?
Score: /8
Practice Exercises
8 exercises저는 학교에 ___.
오다 + 아요 = ?
Find and fix the mistake:
주어요 -> ?
보다 -> ?
Contractions are optional.
A: 어디 가요? B: 집에 ___.
커피 / 주다 / polite
Which uses ㅘ?
Score: /8
Practice Bank
10 exercises유튜브를 ___.
저는 학교에 가아요.
[마셔요] [물을] [저는]
이거 주세요/줘요.
지금 ___.
Match these pairs:
영어를 ___.
공원에서 운동하아요.
I am standing.
Pick the odd one out.
Score: /10
FAQ (8)
No, they are mandatory in standard Korean.
To make speech faster and more natural.
Yes, almost all verbs follow these rules.
They have their own rules, but still use contractions.
Yes, they are required in writing.
Yes, it is '하 + 여'.
Look at the stem's last vowel.
Very few, mostly irregular verbs.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Contractions like 'del' (de + el).
Korean contractions are mandatory for conjugation.
Elision like 'l'ami' (le + ami).
Korean merges vowels into new sounds.
Contractions like 'ins' (in + das).
Korean is a verb-final, agglutinative language.
None.
Korean has a much more complex vowel system.
None.
Korean uses suffixal conjugation.
None.
Korean is agglutinative.
Learning Path
Prerequisites
Related Grammar Rules
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The ㅂ Melting Rule: Hot & Cold Verbs (chupda/chuwoyo)
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Irregular Verbs (ㄷ → ㄹ): Walking, Hearing, Asking
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The 'Eu' Drop Pattern: Why 으 Disappears
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