Expressing 'should be' with '야지' — Korean Grammar

The ending (ya·jiya·jiya·jiya·ci) attaches to verb stems to express necessity, obligation, or determination. It carries the meaning of "have to," "should," or "ought to."

This form is primarily used in casual speech (pan·malban·malpan·malpan·mal) and often implies that the action is natural, obvious, or the only logical choice. It is essentially a contraction of the longer form (ya ha·jiya ha·jiya ha·jiya ha·ci).

Construction

To use this ending, you must conjugate the verb stem based on its last vowel, similar to the standard present tense conjugation, and then add (ya·jiya·jiya·jiya·ci).

If the stem ends in ㅗ (o) or ㅏ (a), add (a·ya·jia·ya·jia·ya·jia·ya·ci).
If the stem ends in any other vowel, add (ŏ·ya·jieo·ya·jiŏ·ya·jie·ya·ci).
For (ha·daha·daha·daha·ta) verbs, it becomes (hæ·ya·jihae·ya·jihae·ya·jihay·ya·ci).

가다 → 가야지
ka·da → ka·ya·jiga·da → ga·ya·jika·da → ka·ya·jika·ta → ka·ya·ci
to go → should go
먹다 → 먹어야지
mŏk·da → mŏg·ŏ·ya·jimeok·da → meog·eo·ya·jimŏk·da → mŏg·ŏ·ya·jimek·ta → meg·e·ya·ci
to eat → should eat
공부하다 → 공부해야지
kong·bu·ha·da → kong·bu·hæ·ya·jigong·bu·ha·da → gong·bu·hae·ya·jikong·bu·ha·da → kong·bu·hae·ya·jikong·pu·ha·ta → kong·pu·hay·ya·ci
to study → should study

Usage 1: Self-Determination (Monologue)

Speakers often use (ya·jiya·jiya·jiya·ci) when talking to themselves to reinforce a decision or confirm a plan. In this context, it translates to "I really must" or "I'm going to."

이제 집에 가야지.
i·je chib·e ka·ya·ji.i·je jib·e ga·ya·ji.i·je chib·e ka·ya·ji.i·cey cib·ey ka·ya·ci.
I should go home now.
살을 빼야지.
sal·ŭl bbæ·ya·ji.sal·eul bbae·ya·ji.sal·ŭl ppae·ya·ji.sal·ul ppay·ya·ci.
I have to lose weight.
내일은 일찍 일어나야지.
næ·il·ŭn il·jjik ir·ŏ·na·ya·ji.nae·il·eun il·jjik ir·eo·na·ya·ji.nae·il·ŭn il·tchik ir·ŏ·na·ya·ji.nay·il·un il·ccik ir·e·na·ya·ci.
I must wake up early tomorrow.

Usage 2: Casual Advice or Commands

When speaking to close friends or those younger than you, (ya·jiya·jiya·jiya·ci) functions as a soft command or advice. It suggests that the listener "ought to" do something because it is the right thing to do.

약속을 지켜야지.
yak·sog·ŭl chi·kʰyŏ·ya·ji.yak·sog·eul ji·kyeo·ya·ji.yak·sog·ŭl chi·k'yŏ·ya·ji.yak·sog·ul ci·khye·ya·ci.
You should keep your promises.
친구한테 사과해야지.
chin·gu·han·tʰe sa·gwa·hæ·ya·ji.jin·gu·han·te sa·gwa·hae·ya·ji.chin·gu·han·t'e sa·gwa·hae·ya·ji.cin·ku·han·they sa·kwa·hay·ya·ci.
You ought to apologize to your friend.

Comparison with '야 하다'

While (ya ha·daya ha·daya ha·daya ha·ta) is a neutral statement of obligation ("I have to..."), (ya·jiya·jiya·jiya·ci) adds a nuance of personal will or obviousness ("Of course I have to...").

(ya ha·daya ha·daya ha·daya ha·ta): Objective necessity.
(ya·jiya·jiya·jiya·ci): Subjective determination or emphasizing that the action is natural.

Politeness Levels

(ya·jiya·jiya·jiya·ci) is strictly casual (pan·malban·malpan·malpan·mal). You cannot use it with elders or in formal settings.

To express this same nuance politely, you add the particle (yo). In spoken Korean, (ya·ji·yoya·ji·yoya·ji·yoya·ci·yo) is almost always contracted to (ya·jyoya·jyoya·jyoya·cyo).

더 열심히 해야죠.
tŏ yŏl·sim·hi hæ·ya·jyo.deo yeol·sim·hi hae·ya·jyo.tŏ yŏl·sim·hi hae·ya·jyo.te yel·sim·hi hay·ya·cyo.
You should work harder. (Polite)
조심해야죠.
cho·sim·hæ·ya·jyo.jo·sim·hae·ya·jyo.cho·sim·hae·ya·jyo.co·sim·hay·ya·cyo.
You have to be careful. (Polite)

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