📝 Grammar B1

-아/어야 하다

-a/eoya hada

Must / Have to / Should

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What it means

Express obligation or necessity with -아/어야 하다. This is the "must" or "have to" of Korean — when something is required or necessary.

Nuance & when to use

가야 해요 = I have to go. 먹어야 해요 = I have to eat. For stronger obligation: -아/어야만 하다 (absolutely must). For weaker suggestion: -(으)면 좋겠어요 (it would be nice if...). The -야 is the key indicator of necessity.

⚠ Common mistake

Don't add -요 to the middle: NOT 가야요 해요. The -요 goes at the very end: 가야 해요 (o) or 가야 합니다 (formal).

Example sentences

숙제를 해야 해요. Sukjereul haeya haeyo. I have to do homework.
지금 가야 해요. Jigeum gaya haeyo. I have to go now.
더 열심히 해야 해요. Deo yeolsimhi haeya haeyo. I have to work harder.

See also

해야겠어요 -(으)면 안 되다 안 해도 돼요
Next lesson →

← -아/어 있다 -아서/어서 →

FAQ

When is this used?

가야 해요 = I have to go. 먹어야 해요 = I have to eat. For stronger obligation: -아/어야만 하다 (absolutely must). For weaker suggestion: -(으)면 좋겠어요 (it would be nice if...). The -야 is the key indicator of necessity.

What's a common mistake?

Don't add -요 to the middle: NOT 가야요 해요. The -요 goes at the very end: 가야 해요 (o) or 가야 합니다 (formal).

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