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Obligation: Must and Have to: -아/어야 되다 / 하다

Keywords
-아/어야 되다
Lesson #
S
Done
Section
Basic Grammar
✅
TL;DR 🦄
  • ✅ -아/어야 되다 [-a/eo-ya doe-da] and -아/어야 하다 [-a/eo-ya ha-da] mean must / have to / need to do something.
  • 🧭 Everyday polite forms are -아/어야 돼요 [-a/eo-ya dwae-yo] and -아/어야 해요 [-a/eo-ya hae-yo].
  • 🧩 Build it with the 아/어 form + 야 되다/하다. 가다 [ga-da] = to go → 가야 돼요 [ga-ya dwae-yo] = I have to go.
🔊
🎧 Iru Helper Note — Open
Korean Helper Widgets
Korean Helper Widgets and type any Korean word or sentence from this lesson to hear it read aloud. Listen especially to 가야 돼요 [ga-ya dwae-yo], 먹어야 돼요 [meo-geo-ya dwae-yo], and 공부해야 해요 [gong-bu-hae-ya hae-yo]. ✅
 

🌈 The Big Picture

Use -아/어야 되다 or -아/어야 하다 when an action is necessary, required, or expected. In English, this can sound like “must,” “have to,” “need to,” or sometimes “should,” depending on context. 🧭
 
Compare:
  • 학교에 가요. [hak-kkyo-e ga-yo] = I go to school. 🏫
  • 학교에 가야 돼요. [hak-kkyo-e ga-ya dwae-yo] = I have to go to school. 🏫✅
 
Tiny map: 학교에 [hak-kkyo-e] = to school, 가야 [ga-ya] = in the “must-go” connector shape, and 돼요 [dwae-yo] = it becomes necessary / it has to happen.
 

🎨 The Core “Have To” Family

Main patterns
  • 동사 + 아/어야 되다 [-a/eo-ya doe-da] = have to / must / need to do
  • 동사 + 아/어야 하다 [-a/eo-ya ha-da] = have to / must / need to do
 
Common polite forms
  • -아/어야 돼요 [-a/eo-ya dwae-yo] = have to / must / need to
  • -아/어야 해요 [-a/eo-ya hae-yo] = have to / must / need to
  • -아/어야 됐어요 [-a/eo-ya dwae-sseo-yo] = had to
  • -아/어야 했어요 [-a/eo-ya hae-sseo-yo] = had to
 
Tiny nuance
  • -아/어야 돼요 is very common in everyday speech. 🗣️
  • -아/어야 해요 is also common and can feel a little more direct or standard. ✅
For this beginner lesson, treat them as meaning almost the same thing: have to / must / need to.
 
Useful obligation verbs
  • 가다 [ga-da] = to go 🚶 → 가야 돼요 [ga-ya dwae-yo] = have to go
  • 오다 [o-da] = to come 👣 → 와야 돼요 [wa-ya dwae-yo] = have to come
  • 먹다 [meok-tta] = to eat 🍚 → 먹어야 돼요 [meo-geo-ya dwae-yo] = have to eat
  • 마시다 [ma-si-da] = to drink 💧 → 마셔야 돼요 [ma-syeo-ya dwae-yo] = have to drink
  • 읽다 [ik-tta] = to read 📚 → 읽어야 돼요 [il-geo-ya dwae-yo] = have to read
  • 쓰다 [sseu-da] = to write ✍️ → 써야 돼요 [sseo-ya dwae-yo] = have to write
  • 듣다 [deut-tta] = to listen 👂 → 들어야 돼요 [deu-reo-ya dwae-yo] = have to listen
  • 공부하다 [gong-bu-ha-da] = to study 📘 → 공부해야 돼요 [gong-bu-hae-ya dwae-yo] = have to study
  • 일하다 [il-ha-da] = to work 💼 → 일해야 돼요 [il-hae-ya dwae-yo] = have to work
  • 자다 [ja-da] = to sleep 😴 → 자야 돼요 [ja-ya dwae-yo] = have to sleep
 
🧰
Useful context words
  • 📅 오늘 [o-neul] = today
  • 🌅 내일 [nae-il] = tomorrow
  • ⏰ 지금 [ji-geum] = now
  • 🏫 학교 [hak-kkyo] = school
  • 🏠 집 [jip] = home
  • ✍️ 숙제 [suk-jje] = homework
  • 📝 시험 [si-heom] = test / exam
  • 💊 약 [yak] = medicine
  • 💼 일 [il] = work
 

🛠️ How They Work in a Sentence

1. A required trip
  • 내일 학교에 가야 돼요. [nae-il hak-kkyo-e ga-ya dwae-yo] = I have to go to school tomorrow. 🏫
      • 내일 [nae-il] = tomorrow, 학교에 [hak-kkyo-e] = to school, 가야 돼요 [ga-ya dwae-yo] = have to go.
 
2. A study obligation
  • 오늘 공부해야 해요. [o-neul gong-bu-hae-ya hae-yo] = I have to study today. 📘
      • 오늘 [o-neul] = today, 공부해야 해요 [gong-bu-hae-ya hae-yo] = have to study.
 
3. A health necessity
  • 약을 먹어야 돼요. [ya-geul meo-geo-ya dwae-yo] = I have to take medicine. 💊
      • 약을 [ya-geul] = medicine as the object, 먹어야 돼요 [meo-geo-ya dwae-yo] = have to eat/take.
 

🧩 General Formation Rule

Use the 아/어 form, then add 야 되다 or 야 하다:
  • 가다 → 가야 돼요 / 가야 해요 [ga-da → ga-ya dwae-yo / ga-ya hae-yo] ✅
  • 먹다 → 먹어야 돼요 / 먹어야 해요 [meok-tta → meo-geo-ya dwae-yo / meo-geo-ya hae-yo] ✅
  • 마시다 → 마셔야 돼요 / 마셔야 해요 [ma-si-da → ma-syeo-ya dwae-yo / ma-syeo-ya hae-yo] ✅
  • 읽다 → 읽어야 돼요 / 읽어야 해요 [ik-tta → il-geo-ya dwae-yo / il-geo-ya hae-yo] ✅
  • 쓰다 → 써야 돼요 / 써야 해요 [sseu-da → sseo-ya dwae-yo / sseo-ya hae-yo] ✅
  • 공부하다 → 공부해야 돼요 / 공부해야 해요 [gong-bu-ha-da → gong-bu-hae-ya dwae-yo / gong-bu-hae-ya hae-yo] ✅
 

🚨 Small Exception / Shape Notes

  • 하다 verbs become 해야 돼요 / 해야 해요: 공부하다 → 공부해야 돼요, 일하다 → 일해야 해요.
  • 쓰다 [sseu-da] becomes 써야 [sseo-ya], not 쓰어야.
  • 듣다 [deut-tta] is ㄷ-irregular: 듣다 → 들어야 돼요 [deu-reo-ya dwae-yo].
  • 되다 contracts in everyday speech: 되어요 → 돼요, 되었어요 → 됐어요.
 

📚 Cross-check note

This lesson’s -아/어야 되다 / -아/어야 하다 obligation pattern and the 되어요 → 돼요 contraction were cross-checked with 국립국어원 / korean.go.kr. ✅
 

🪞 Synonym Alert

  • -아/어야 되다 / -아/어야 하다 = must / have to / need to. Focuses on necessity or obligation. ✅
  • -지 않아도 되다 = do not have to / it is okay even if you do not. This is the opposite “not necessary” idea. 🌿
  • -(으)면 안 되다 = must not / should not / not allowed. This is prohibition, not simple obligation. 🚫
 
Compare:
  • 공부해야 돼요. [gong-bu-hae-ya dwae-yo] = I have to study. ✅
  • 공부하지 않아도 돼요. [gong-bu-ha-ji a-na-do dwae-yo] = I don’t have to study. 🌿
  • 여기에서 자면 안 돼요. [yeo-gi-e-seo ja-myeon an dwae-yo] = You must not sleep here. 🚫
 

⚠️ Pitfalls to Dodge

  • ❌ 가다야 돼요 [ga-da-ya dwae-yo] → ✅ 가야 돼요 [ga-ya dwae-yo] — remove dictionary 다.
  • ❌ 먹야 돼요 [meok-ya dwae-yo] → ✅ 먹어야 돼요 [meo-geo-ya dwae-yo] — use the 아/어 form before 야.
  • ❌ 공부하야 돼요 [gong-bu-ha-ya dwae-yo] → ✅ 공부해야 돼요 [gong-bu-hae-ya dwae-yo] — 하다 → 해야.
  • ❌ 써어야 돼요 [sseo-eo-ya dwae-yo] → ✅ 써야 돼요 [sseo-ya dwae-yo] — 쓰다 → 써야.
  • ❌ 공부해야돼요 as one tight chunk → ✅ 공부해야 돼요 — keep 되다 separate.
 
🎉 With -아/어야 되다 / -아/어야 하다, Korean can say what life demands: go to school, study for exams, take medicine, write homework, and bravely complete all grammar obligations. ✅✨
 

Try this exercise

Instructions
Complete each sentence with the correct 아/어야 form before 돼요. These are varied real-life obligation situations, not just simple repeats. Read the full sentence aloud, then open the Answer toggle. ✅
1. 내일 아침 공항에 일찍 ＿＿＿＿ 돼요.
[nae-il a-chim gong-hang-e il-jjik ＿＿＿＿ dwae-yo]
I have to go to the airport early tomorrow morning. ✈️
Answer
가야 [ga-ya] — 가다 → 가야 돼요.
2. 감기약을 ＿＿＿＿ 돼요.
[gam-gi-ya-geul ＿＿＿＿ dwae-yo]
I have to take cold medicine. 💊
Answer
먹어야 [meo-geo-ya] — Korean often says 약을 먹다 = to take medicine.
3. 오늘 밤까지 발표 자료를 ＿＿＿＿ 돼요.
[o-neul bam-kka-ji bal-pyo ja-ryo-reul ＿＿＿＿ dwae-yo]
I have to write/prepare presentation materials by tonight. 📊
Answer
써야 [sseo-ya] — 쓰다 → 써야 돼요.
4. 선생님 설명을 끝까지 잘 ＿＿＿＿ 돼요.
[seon-saeng-nim seol-myeong-eul kkeut-kka-ji jal ＿＿＿＿ dwae-yo]
I have to listen carefully to the teacher’s explanation until the end. 👂
Answer
들어야 [deu-reo-ya] — ㄷ-irregular: 듣다 → 들어야.
5. 내일 아침 회사에 일찍 ＿＿＿＿ 돼요.
[nae-il a-chim hoe-sa-e il-jjik ＿＿＿＿ dwae-yo]
I have to come to the office early tomorrow morning. 💼
Answer
와야 [wa-ya] — 오다 → 와야 돼요.
6. 이번 주말에 책 세 권을 ＿＿＿＿ 돼요.
[i-beon ju-mal-e chaek se gwon-eul ＿＿＿＿ dwae-yo]
I have to read three books this weekend. 📚
Answer
읽어야 [il-geo-ya] — 읽다 → 읽어야 돼요.
7. 회사 정보를 더 ＿＿＿＿ 돼요.
[hoe-sa jeong-bo-reul deo ＿＿＿＿ dwae-yo]
I have to study/research more company information. 🧑‍💼
Answer
공부해야 [gong-bu-hae-ya] — 공부하다 → 공부해야 돼요.
8. 물을 많이 ＿＿＿＿ 돼요.
[mu-reul ma-ni ＿＿＿＿ dwae-yo]
I have to drink a lot of water. 💧
Answer
마셔야 [ma-syeo-ya] — 마시다 → 마셔야 돼요.
9. 오늘은 빨리 ＿＿＿＿ 돼요.
[o-neu-reun ppal-li ＿＿＿＿ dwae-yo]
I have to sleep early today. 😴
Answer
자야 [ja-ya] — 자다 → 자야 돼요.
10. 오늘 밤까지 계속 ＿＿＿＿ 돼요.
[o-neul bam-kka-ji gye-sok ＿＿＿＿ dwae-yo]
I have to keep working until tonight. 🗂️
Answer
일해야 [il-hae-ya] — 일하다 → 일해야 돼요.
📚
Vocabulary Box
  • ✈️ 비행기 [bi-haeng-gi] → airplane
  • 🛫 공항 [gong-hang] → airport
  • 💊 감기약 [gam-gi-yak] → cold medicine
  • 🍽️ 식사 후에 [sik-ssa hu-e] → after a meal
  • 📊 발표 [bal-pyo] → presentation
  • 📄 자료 [ja-ryo] → materials / data
  • 👂 설명 [seol-myeong] → explanation
  • 💼 회의 [hoe-ui] → meeting
  • 🧑‍💼 면접 [myeon-jeop] → interview
  • ⏳ 마감 [ma-gam] → deadline
Tip 💡 First understand the situation, then choose the obligation verb.
🚀
Want more reps? Keep scrolling to the Practice Hub when you’re ready!
 
📦
🎯 Practice Hub — Obligation: -아/어야 되다 / 하다
 
Welcome to the Practice Hub for -아/어야 되다 and -아/어야 하다. You’ll practice obligations in more realistic contexts: travel deadlines, health rules, interviews, homework, exams, meetings, and “oops, life has requirements” moments. ✅📋
 
🔊 Audio reminder: Use
Korean Helper Widgets
Korean Helper Widgets whenever you want to hear a sentence before checking the answer.
 
📝 Instructions: Fill each blank with the correct 아/어야 form, 되다/하다 form, or correction. Read the whole situation first; the context is part of the challenge.
 

Exercise 1 — Real-Life Obligations with 돼요 ✅

A. 오늘 대사관에 ＿＿＿＿ 돼요.
[o-neul dae-sa-gwa-ne ＿＿＿＿ dwae-yo]
I have to go to the embassy today. 🛂
Answer
가야 [ga-ya] — 가다 → 가야 돼요.
B. 오늘 방을 깨끗하게 ＿＿＿＿ 돼요.
[o-neul bang-eul kkae-kkeu-ta-ge ＿＿＿＿ dwae-yo]
I have to clean the room today. 🧹
Answer
청소해야 [cheong-so-hae-ya] — 청소하다 → 청소해야 돼요.
C. 우산을 ＿＿＿＿ 돼요.
[u-sa-neul ＿＿＿＿ dwae-yo]
I have to buy an umbrella. ☔
Answer
사야 [sa-ya] — 사다 → 사야 돼요.
D. 팀에게 메시지를 ＿＿＿＿ 돼요.
[ti-me-ge me-si-ji-reul ＿＿＿＿ dwae-yo]
I have to send the team a message. 💬
Answer
보내야 [bo-nae-ya] — 보내다 → 보내야 돼요.
E. 물을 조금 ＿＿＿＿ 돼요.
[mu-reul jo-geum ＿＿＿＿ dwae-yo]
I have to add a little water. 🍲
Answer
넣어야 [neo-eo-ya] — 넣다 → 넣어야 돼요.
F. 오늘 밤 택시를 ＿＿＿＿ 돼요.
[o-neul bam taek-si-reul ＿＿＿＿ dwae-yo]
I have to take a taxi tonight. 🚕
Answer
타야 [ta-ya] — 타다 → 타야 돼요.
G. 계약서를 꼼꼼히 ＿＿＿＿ 돼요.
[gye-yak-sseo-reul kkom-kko-mi ＿＿＿＿ dwae-yo]
I have to read the contract carefully. 📄
Answer
읽어야 [il-geo-ya] — 읽다 → 읽어야 돼요.
H. 조용히 ＿＿＿＿ 돼요.
[jo-yong-hi ＿＿＿＿ dwae-yo]
I have to speak quietly. 🤫
Answer
말해야 [mal-hae-ya] — 말하다 → 말해야 돼요.
I. 물을 충분히 ＿＿＿＿ 돼요.
[mu-reul chung-bun-hi ＿＿＿＿ dwae-yo]
I have to drink enough water. 💧
Answer
마셔야 [ma-syeo-ya] — 마시다 → 마셔야 돼요.
J. 오늘 밤에는 일찍 ＿＿＿＿ 돼요.
[o-neul ba-me-neun il-jjik ＿＿＿＿ dwae-yo]
I have to sleep early tonight. 😴
Answer
자야 [ja-ya] — 자다 → 자야 돼요.
✅
Vocabulary Box
  • 🛂 여권 [yeo-kkwon] → passport
  • 🏛️ 대사관 [dae-sa-gwan] → embassy
  • 🧹 청소하다 [cheong-so-ha-da] → to clean
  • ☔ 우산 [u-san] → umbrella
  • 💬 메시지 [me-si-ji] → message
  • 🚇 지하철 [ji-ha-cheol] → subway
  • 📄 계약서 [gye-yak-sseo] → contract
  • 🤫 조용히 [jo-yong-hi] → quietly
  • 🏋️ 운동 후 [un-dong hu] → after exercise
Tip 💡 These sentences require meaning, not pattern-matching.
 

Exercise 2 — Choose the Natural Ending: 돼요, 해요, 됐어요, or 했어요 🧭

A. 내일 아침 7시에 병원에 가야 ＿＿＿＿.
[nae-il a-chim ilgop si-e byeong-wo-ne ga-ya ＿＿＿＿]
I have to go to the hospital at 7 tomorrow morning. 🏥
Answer
돼요 / 해요 [dwae-yo / hae-yo] — present/future obligation.
B. 어제 갑자기 야근해야 ＿＿＿＿.
[eo-je gap-ja-gi ya-geun-hae-ya ＿＿＿＿]
Yesterday, I suddenly had to work overtime. 🌙
Answer
됐어요 / 했어요 [dwae-sseo-yo / hae-sseo-yo] — past obligation.
C. 다음 달까지 새 집을 찾아야 ＿＿＿＿.
[da-eum dal-kka-ji sae ji-beul cha-ja-ya ＿＿＿＿]
I have to find a new home by next month. 🏠
Answer
돼요 / 해요 [dwae-yo / hae-yo] — current obligation for a future deadline.
D. 지난주에는 매일 보고서를 써야 ＿＿＿＿.
[ji-nan-ju-e-neun mae-il bo-go-seo-reul sseo-ya ＿＿＿＿]
Last week, I had to write a report every day. 📑
Answer
됐어요 / 했어요 [dwae-sseo-yo / hae-sseo-yo] — past repeated obligation.
E. 고객센터에 전화해야 ＿＿＿＿.
[go-gaek-sen-teo-e jeon-hwa-hae-ya ＿＿＿＿]
I have to call customer service. ☎️
Answer
돼요 / 해요 [dwae-yo / hae-yo] — general/current requirement.
F. 지난달에는 주말마다 할머니 댁에 가야 ＿＿＿＿.
[ji-nan-da-re-neun ju-mal-ma-da hal-meo-ni dae-ge ga-ya ＿＿＿＿]
Last month, I had to go to my grandmother’s house every weekend. 👵
Answer
됐어요 / 했어요 [dwae-sseo-yo / hae-sseo-yo] — past habit/obligation.
G. 먼저 회원가입을 해야 ＿＿＿＿.
[meon-jeo hoe-won-ga-i-beul hae-ya ＿＿＿＿]
I have to sign up first. 📱
Answer
돼요 / 해요 [dwae-yo / hae-yo] — present/general requirement.
H. 어제 표를 다시 사야 ＿＿＿＿.
[eo-je pyo-reul da-si sa-ya ＿＿＿＿]
Yesterday, I had to buy the ticket again. 🎫
Answer
됐어요 / 했어요 [dwae-sseo-yo / hae-sseo-yo] — past obligation caused by a situation.
I. 오늘 자기소개를 연습해야 ＿＿＿＿.
[o-neul ja-gi-so-gae-reul yeon-seu-pae-ya ＿＿＿＿]
I have to practice my self-introduction today. 🎤
Answer
돼요 / 해요 [dwae-yo / hae-yo] — current obligation.
J. 그때는 걸어가야 ＿＿＿＿.
[geu-ttae-neun geo-reo-ga-ya ＿＿＿＿]
Back then, I had to walk there. 🚶
Answer
됐어요 / 했어요 [dwae-sseo-yo / hae-sseo-yo] — past obligation.
🧭
Vocabulary Box
  • 🏥 병원 [byeong-won] → hospital / clinic
  • 🌙 야근하다 [ya-geun-ha-da] → to work overtime
  • 🏠 새 집 [sae jip] → new home
  • 📑 보고서 [bo-go-seo] → report
  • ☎️ 고객센터 [go-gaek-sen-teo] → customer service
  • 📱 회원가입 [hoe-won-ga-ip] → sign-up / registration
  • 🎫 표 [pyo] → ticket
  • 🎤 자기소개 [ja-gi-so-gae] → self-introduction
Tip 💡 Present/future requirement → 돼요/해요. Past requirement → 됐어요/했어요.
 

Exercise 3 — Formation Challenge: Choose the Correct 아/어야 Shape 🧩

A. 예약하다 → 호텔을 미리 ＿＿＿＿ 돼요.
[ye-yak-ha-da → ho-te-reul mi-ri ＿＿＿＿ dwae-yo]
I have to reserve the hotel in advance. 🏨
Answer
예약해야 [ye-yak-hae-ya] — 하다 → 해야.
B. 만들다 → 생일 케이크를 직접 ＿＿＿＿ 돼요.
[man-deul-da → saeng-il ke-i-keu-reul jik-jjeop ＿＿＿＿ dwae-yo]
I have to make the birthday cake myself. 🎂
Answer
만들어야 [man-deu-reo-ya] — 만들다 → 만들어야.
C. 돕다 → 친구를 ＿＿＿＿ 돼요.
[dop-tta → chin-gu-reul ＿＿＿＿ dwae-yo]
I have to help the new friend. 🤝
Answer
도와야 [do-wa-ya] — ㅂ-irregular: 돕다 → 도와야.
D. 끄다 → 휴대폰을 ＿＿＿＿ 돼요.
[kkeu-da → hyu-dae-po-neul ＿＿＿＿ dwae-yo]
I have to turn off my phone. 📵
Answer
꺼야 [kkeo-ya] — 끄다 → 꺼야.
E. 걷다 → 지하철역까지 20분 정도 ＿＿＿＿ 돼요.
[geot-tta → ji-ha-cheol-lyeok-kka-ji i-sip bun jeong-do ＿＿＿＿ dwae-yo]
I have to walk about 20 minutes to the subway station. 🚶
Answer
걸어야 [geo-reo-ya] — ㄷ-irregular: 걷다 → 걸어야.
F. 고르다 → 선물 하나를 빨리 ＿＿＿＿ 돼요.
[go-reu-da → seon-mul ha-na-reul ppal-li ＿＿＿＿ dwae-yo]
I have to choose one gift quickly. 🎁
Answer
골라야 [gol-la-ya] — 르-irregular: 고르다 → 골라야.
G. 부르다 → 제 이름을 ＿＿＿＿ 돼요.
[bu-reu-da → je i-reu-meul ＿＿＿＿ dwae-yo]
I have to call/say my name. 📣
Answer
불러야 [bul-leo-ya] — 르-irregular: 부르다 → 불러야.
H. 기다리다 → 밖에서 ＿＿＿＿ 돼요.
[gi-da-ri-da → ba-kke-seo ＿＿＿＿ dwae-yo]
I have to wait outside. ⏳
Answer
기다려야 [gi-da-ryeo-ya] — 기다리다 → 기다려야.
I. 보내다 → 오늘 안에 이메일을 ＿＿＿＿ 돼요.
[bo-nae-da → o-neul a-ne i-me-i-reul ＿＿＿＿ dwae-yo]
I have to send the email within today. 📧
Answer
보내야 [bo-nae-ya] — 보내다 → 보내야.
J. 짓다 → 시골에 작은 집을 ＿＿＿＿ 돼요.
[jit-tta → si-go-re ja-geun ji-beul ＿＿＿＿ dwae-yo]
I have to build a small house in the countryside. 🏡
Answer
지어야 [ji-eo-ya] — ㅅ-irregular: 짓다 → 지어야.
🧩
Vocabulary Box
  • 🏨 예약하다 [ye-yak-ha-da] → to reserve
  • 🎂 만들다 [man-deul-da] → to make
  • 🤝 돕다 [dop-tta] → to help
  • 📵 끄다 [kkeu-da] → to turn off
  • 🚶 걷다 [geot-tta] → to walk
  • 🎁 고르다 [go-reu-da] → to choose
  • 📣 부르다 [bu-reu-da] → to call / sing
  • ⏳ 기다리다 [gi-da-ri-da] → to wait
  • 📧 보내다 [bo-nae-da] → to send
  • 🏡 짓다 [jit-tta] → to build
Tip 💡 This exercise adds irregulars, so do not rely on one simple pattern.
 

Exercise 4 — Obligation, No Need, or Prohibition? 🚦

A. 도서관에서는 조용히 ＿＿＿＿ 돼요.
[do-seo-gwa-ne-seo-neun jo-yong-hi ＿＿＿＿ dwae-yo]
In the library, you have to speak quietly. 🤫
Answer
말해야 [mal-hae-ya] — obligation: 말해야 돼요.
B. 오늘 학교에 ＿＿＿＿ 돼요.
[o-neul hak-kkyo-e ＿＿＿＿ dwae-yo]
I don’t have to go to school today. 🌿
Answer
가지 않아도 [ga-ji a-na-do] — not necessary: 가지 않아도 돼요.
C. 박물관에서 사진을 ＿＿＿＿ 안 돼요.
[bang-mul-gwan-e-seo sa-ji-neul ＿＿＿＿ an dwae-yo]
You must not take photos at the museum. 🚫
Answer
찍으면 [jji-geu-myeon] — prohibition: 사진을 찍으면 안 돼요.
D. 돈을 다시 ＿＿＿＿ 않아도 돼요.
[do-neul da-si ＿＿＿＿ a-na-do dwae-yo]
I don’t have to pay money again. 🌿
Answer
내지 [nae-ji] — not necessary: 내지 않아도 돼요.
E. 안전벨트를 ＿＿＿＿ 돼요.
[an-jeon-bel-teu-reul ＿＿＿＿ dwae-yo]
You have to wear a seatbelt. 🚗
Answer
매야 [mae-ya] — obligation: 안전벨트를 매야 돼요.
F. 여기에서 담배를 ＿＿＿＿ 안 돼요.
[yeo-gi-e-seo dam-bae-reul ＿＿＿＿ an dwae-yo]
You must not smoke here. 🚭
Answer
피우면 [pi-u-myeon] — prohibition: 담배를 피우면 안 돼요.
G. 종이 신청서를 ＿＿＿＿ 않아도 돼요.
[jong-i sin-cheong-seo-reul ＿＿＿＿ a-na-do dwae-yo]
I don’t have to write a paper application. 🌿
Answer
쓰지 [sseu-ji] — not necessary: 쓰지 않아도 돼요.
H. 보고서를 꼭 ＿＿＿＿ 돼요.
[bo-go-seo-reul kkok ＿＿＿＿ dwae-yo]
I absolutely have to submit the report. 📑
Answer
내야 [nae-ya] — obligation: 내야 돼요.
I. 시험에서 휴대폰을 ＿＿＿＿ 안 돼요.
[si-heom-e-seo hyu-dae-po-neul ＿＿＿＿ an dwae-yo]
You must not use your phone on the test. 📵
Answer
쓰면 [sseu-myeon] — prohibition: 휴대폰을 쓰면 안 돼요.
J. 오늘 다 ＿＿＿＿ 않아도 돼요.
[o-neul da ＿＿＿＿ a-na-do dwae-yo]
I don’t have to finish everything today. 🌿
Answer
끝내지 [kkeut-nae-ji] — not necessary: 끝내지 않아도 돼요.
🚦
Vocabulary Box
  • ✅ -아/어야 돼요 = have to / must
  • 🌿 -지 않아도 돼요 = do not have to
  • 🚫 -(으)면 안 돼요 = must not / not allowed
  • 📚 도서관 [do-seo-gwan] → library
  • 🖼️ 박물관 [bang-mul-gwan] → museum
  • 🚗 안전벨트 [an-jeon-bel-teu] → seatbelt
  • 🚭 금연 구역 [geu-myeon gu-yeok] → no-smoking area
  • 📄 신청서 [sin-cheong-seo] → application form
Tip 💡 This exercise mixes three meanings: must, don’t have to, and must not.
 

Exercise 5 — Mixed Mastery + Error Repair 🛡️

A. ❌ 비자를 신청하야 돼요. → ✅ 비자를 ＿＿＿＿ 돼요.
[bi-ja-reul ＿＿＿＿ dwae-yo]
I have to apply for a visa. 🛂
Answer
신청해야 [sin-cheong-hae-ya] — 신청하다 → 신청해야.
B. ❌ 숙소를 찾야 돼요. → ✅ 숙소를 ＿＿＿＿ 돼요.
[suk-sso-reul ＿＿＿＿ dwae-yo]
I have to find accommodation. 🏨
Answer
찾아야 [cha-ja-ya] — 찾다 → 찾아야.
C. ❌ 문을 닫어야 해요. → ✅ 문을 ＿＿＿＿ 해요.
[mu-neul ＿＿＿＿ hae-yo]
I have to close the door. 🚪
Answer
닫아야 [da-da-ya] — 닫다 → 닫아야.
D. ❌ 일찍 일어나야돼요. → ✅ 일찍 ＿＿＿＿ 돼요.
[il-jjik ＿＿＿＿ dwae-yo]
I have to wake up early. ⏰
Answer
일어나야 [i-reo-na-ya] — also fix spacing: 일어나야 돼요.
E. ❌ 손을 씻야 돼요. → ✅ 손을 ＿＿＿＿ 돼요.
[so-neul ＿＿＿＿ dwae-yo]
I have to wash my hands. 🧼
Answer
씻어야 [ssi-seo-ya] — 씻다 → 씻어야.
F. 점심을 빨리 ＿＿＿＿ 해요.
[jeom-si-meul ppal-li ＿＿＿＿ hae-yo]
I have to eat lunch quickly. 🍱
Answer
먹어야 [meo-geo-ya] — 먹어야 해요.
G. 새 비밀번호를 ＿＿＿＿ 해요.
[sae bi-mil-beon-ho-reul ＿＿＿＿ hae-yo]
I have to make a new password. 🔐
Answer
만들어야 [man-deu-reo-ya] — 만들다 → 만들어야.
H. 내일 운동화를 ＿＿＿＿ 돼요.
[nae-il un-dong-hwa-reul ＿＿＿＿ dwae-yo]
I have to wear sneakers tomorrow. 🥾
Answer
신어야 [si-neo-ya] — 신다 → 신어야.
I. 공연장에서 음식을 ＿＿＿＿ 안 돼요.
[gong-yeon-jang-e-seo eum-si-geul ＿＿＿＿ an dwae-yo]
You must not eat food at the performance hall. 🚫
Answer
먹으면 [meo-geu-myeon] — prohibition: 먹으면 안 돼요.
J. 줄을 오래 ＿＿＿＿ 않아도 돼요.
[ju-reul o-rae ＿＿＿＿ a-na-do dwae-yo]
I don’t have to wait in line for long. 🌿
Answer
기다리지 [gi-da-ri-ji] — not necessary: 기다리지 않아도 돼요.
🛡️
Vocabulary Box
  • 🛂 비자 [bi-ja] → visa
  • 🏨 숙소 [suk-sso] → accommodation
  • 🚪 닫다 [dat-tta] → to close
  • ⏰ 일어나다 [i-reo-na-da] → to wake up / get up
  • 🧼 씻다 [ssit-tta] → to wash
  • 🔐 비밀번호 [bi-mil-beon-ho] → password
  • 🥾 운동화 [un-dong-hwa] → sneakers
  • 🎭 공연장 [gong-yeon-jang] → performance hall
  • 🚶 줄 [jul] → line / queue
Tip 💡 Repair the grammar and the meaning: some items need obligation, some prohibition, and some “don’t have to.”
 
🎉
Excellent work! You can now handle real obligations, exceptions, restrictions, and “actually, you don’t have to” moments. Very responsible grammar energy. ✅📋