Guess I should

This pattern is used to express the speaker's intention or a decision they've just made based on a current situation. It's a personal realization that one should or needs to do something.

Meaning & Usage

Meaning: It translates to "I should...", "I guess I'll have to...", or "I need to...". It combines the sense of necessity from -아/어야 하다 (must do) with the nuance of intention or realization from -겠다.

When to use: Use it for first-person statements about your own immediate plans or decisions. It's often said as a monologue or a thought spoken aloud after observing something.

Formation

Attach -아/어야겠다 to a verb stem, following vowel harmony rules.

Stems with final vowel ㅏ or ㅗ: Add -아야겠다.

가다 (to go) → 가야겠다

보다 (to see) → 봐야겠다

Stems with other vowels: Add -어야겠다.

먹다 (to eat) → 먹어야겠다

입다 (to wear) → 입어야겠다

하다 verbs: These become -해야겠다.

공부하다 (to study) → 공부해야겠다

다이어트하다 (to diet) → 다이어트해야겠다

배고프다. 밥 먹어야겠다. / 늦었다. 택시 타야겠다. / 살쪘다. 다이어트해야겠다. / 이제 가야겠다.

While these patterns all relate to future actions, they have distinct nuances.

-아/어야겠다 (Personal Realization)

This pattern emphasizes a subjective decision made by the speaker at the moment of speaking. It's a soft, personal intention, not a strict rule.

Context: You look at the clock and realize it's late.

Example: 벌써 12시네. 이제 자야겠다. (It's already 12. I guess I should sleep now.)

-아/어야 하다/되다 (Objective Obligation)

This expresses a more general, objective necessity or duty. It's about what one must do, often due to rules, deadlines, or external factors.

Context: You have a big test tomorrow.

Example: 내일 시험이 있어서 오늘 밤에 공부해야 해요. (I have a test tomorrow, so I have to study tonight.)

-(으)ㄹ게(요) (Responsive Intention)

This pattern expresses an intention as a response to a listener or situation. It's like saying "Okay, I'll do it" and often carries the nuance of a promise or informing the listener of your next action for their sake.

Context: Your friend says, "I'm hungry."

Example: 그래? 내가 뭐 만들어 줄게. (Really? I'll make you something.) You wouldn't say 만들어 줘야겠다 here.

피곤하다. 한숨 자야겠다. / 내일까지 이 일을 끝내야 해요. / A: 누가 문 좀 닫아줘. B: 내가 닫을게.

This pattern can be easily adjusted for different levels of politeness, as seen throughout the script lines.

Casual Form (반말)

Form: -아/어야겠다 or -아/어야겠어

Usage: Used when talking to yourself, or with close friends, family, and people younger than you. The -겠다 ending sounds more like a monologue, while -겠어 is slightly more conversational.

졸리다. 자야겠어. (I'm sleepy. I should sleep.)

Polite Form (해요체)

Form: -아/어야겠어요

Usage: This is the standard polite form. Simply add -요 to the end. Use it with colleagues, acquaintances, store clerks, or anyone you need to show respect to.

졸려요. 자야겠어요. (I'm sleepy. I should sleep.)

이제 가야겠다. / 이제 가야겠어요. / 이거 사야겠다. / 이거 사야겠어요. / 공부 더 열심히 해야겠다. / 공부 더 열심히 해야겠어요.