elementary · freeInteractive lesson
-아/어야 되다/하다
Try it freeComplete examples with -아/어야 되다/하다Apply the formation rule before moving into the related grammar path.Open →Explanation
-아/어야 되다 and -아/어야 하다 both express obligation: 가야 돼요 / 가야 해요.
돼요 is extremely common in speech; 해요 is also fine.
Negative obligation (“must not”) uses other patterns like -으면 안 되다.
Pair with time expressions for schedules: 내일까지 끝내야 돼요.
Level: elementary. Read the pattern, say each example out loud, then write two new sentences of your own before moving on.
After you can produce the form, open related Chamelingo pages (vocabulary, conjugator, particles) so the pattern connects to words you actually study.
Examples
약을 먹어야 돼요.
I have to take medicine.
지금 출발해야 해요.
We have to leave now.
Common mistakes
- Do not translate English word-for-word into “-아/어야 되다/하다”: match Korean order and speech level.
- Do not treat near-miss patterns as free synonyms of “-아/어야 되다/하다” without checking meaning and register.
How to practice
- Register: learn the polite 요 form first unless this page is specifically about formal 습니다 style.
- Production tip: use the pattern in a short dialogue (question + answer) the same day you study it.
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