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

  1. 여기 앉___. (으면 안 돼요)
  2. 사진 찍___. (으면 안 돼요)
  3. 창문을 열___. (면 안 돼요)
  4. 수업 시간에 자___. (면 안 돼요)
  5. 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
  1. Hand
  2. To finish / end
  3. Here
  4. Class
Down
  1. To be nervous
  2. To wake up / get up
  3. Homework
  4. 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! 🙌

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