어야 되다 vs 으면 안 되다
Explanation
가야 돼요 = have to go.
들어가면 안 돼요 = must not enter.
Permission is -어도 되다: 들어가도 돼요?
Mistake: 가면 안 돼요 when you meant “you don’t have to go” (different pattern).
Level: elementary. Read both sides of the contrast, say the examples out loud, then write one correct and one incorrect sentence and fix it.
Cross-link: open the related grammar or tools page the same day so the fix sticks in your study graph.
This page focuses on “어야 되다 vs 으면 안 되다.” Read for meaning first, then re-read looking only at formality and particle choice — those two details decide whether you sound natural.
After the explanation, study the worked examples and the common mistakes. Then take the one-question check so you know you did not only skim.
Connect this page to nearby Chamelingo lessons and tools. Isolated tips do not stick; a graph of vocabulary + grammar + speaking does. Use the related links at the bottom to keep walking the graph.
When you can explain “어야 되다 vs 으면 안 되다” in one plain English sentence and produce one new Korean example without looking, you are ready to move on — then review again within 24 hours.
Examples
이 표현을 문장에서 써 보세요.
Practice putting “어야 되다 vs 으면 안 되다” into a full polite sentence.
비슷한 말과 비교해서 말해 보세요.
Say a near-miss pair out loud and notice the meaning shift.
오늘 배운 걸 한 번 더 복습해요.
Review once more today so the pattern sticks.
Common mistakes
- Translating the English pair word-for-word without checking which Korean form carries the real distinction.
- Treating the two forms as free synonyms after memorizing only one example.
How to practice
- Level: elementary–friendly explanation; still re-check formality with a native conversation partner when stakes are high.
- Say every example out loud, then change one slot (place, time, or person) to force production — not only recognition.
- After reading, open Chamelingo and recycle the same pattern in a lesson or speaking practice so it enters long-term memory.
Check yourself
Question 1 of 1
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