Day 40: -(으)면 안 돼요 — "Must Not" | Korean Grammar in 10 Minutes a Day
Day 40: -(으)면 안 돼요
Level 2 · Korean Grammar in 10 Minutes a Day
▶️ This lesson starts at 26:17 in the Level 2 video — press play and repeat after me!
Grammar Point
-(으)면 안 돼요
= "you must not ___"
| Vowel / ㄹ | → | -면 안 돼요 — 열다 → 열면 안 돼요 |
| Consonant | → | -으면 안 돼요 — 앉다 → 앉으면 안 돼요 |
💡 Built from pieces you know: -(으)면 + 안 + 돼요.
Example Sentences 🎧
1. 여기 앉으면 안 돼요.
You must not sit here.
2. 사진 찍으면 안 돼요.
You must not take photos.
3. 창문을 열면 안 돼요.
You must not open the window.
4. 수업 시간에 자면 안 돼요.
You must not sleep during class.
5. 여기서 먹으면 안 돼요.
You must not eat here.
6. 늦으면 안 돼요.
You must not be late.
7. 커피를 너무 많이 마시면 안 돼요.
You must not drink too much coffee.
Key Vocabulary
| 수업 | class |
| 너무 | too / too much |
| 많이 | a lot / much |
✏️ Quiz Time
Quiz 1 — Fill in the Blank
- 여기 앉___. (으면 안 돼요)
- 사진 찍___. (으면 안 돼요)
- 창문을 열___. (면 안 돼요)
- 수업 시간에 자___. (면 안 돼요)
- 늦___. (으면 안 돼요)
Quiz 2 — Match It!
Match each Korean sentence to its English meaning.
1. 여기 앉으면 안 돼요.
2. 창문을 열면 안 돼요.
3. 수업 시간에 자면 안 돼요.
4. 늦으면 안 돼요.
A. You must not open the window.
B. You must not sit here.
C. You must not be late.
D. You must not sleep during class.
Quiz 3 — Crossword: Day 36~40 Vocabulary Review
🧩 Vocabulary review — the fillable crossword grid is in the free printable workbook. Here are the words and clues:
손 · 긴장하다 · 끝나다 · 일어나다 · 숙제 · 여기 · 창문 · 수업
Across
- Hand
- To finish / end
- Here
- Class
Down
- To be nervous
- To wake up / get up
- Homework
- Window
👉 Show Answers
Quiz 1: 1. 으면 안 돼요, 2. 으면 안 돼요, 3. 면 안 돼요, 4. 면 안 돼요, 5. 으면 안 돼요
Quiz 2: 1-B, 2-A, 3-D, 4-C
Quiz 3: Across — 1. 손 3. 끝나다 5. 여기 7. 수업 / Down — 2. 긴장하다 4. 일어나다 6. 숙제 8. 창문
📝 Homework: Your Turn!
Give me a rule using -(으)면 안 돼요:
Go to the YouTube video and write a rule.
For example:
수업 시간에 자면 안 돼요.
Don't be shy — I read every one! 🙌