-아/어야지요

-아/어야지요 (-아/어야죠) means 'of course one should / I really must …' — a firm intention or obvious duty.

문장 끝·말투Endings & speech style

Han: For a future resolution use present -아/어야지요; -았/었어야지요 is regret about the past.

Examples

그런 일은 미리 말했어야지요.You should have told me about that beforehand.

시험이 다음 주니까 이제 공부해야죠.The exam is next week, so I really have to study now.

감기에 걸렸으면 약을 먹어야지요.If you've caught a cold, of course you should take medicine.

-아/어야지요vs-아/어야 해요-아/어야 해요 states an obligation; -아/어야지요 adds 'naturally / I'm determined', sounding more personal.

V/A+아야지요 / 어야지요 / 해야지요

가다 → 가야지요, 먹다 → 먹어야죠

About yourself: a resolution (내일부터 운동해야지). About others: advice or mild scolding.
Past -았/었어야지요 = 'you should have'.

Wrong: ~~어제 일찍 잤어야지요 (about tomorrow's plan)~~

Right: 내일은 일찍 자야지요.

For a future resolution use present -아/어야지요; -았/었어야지요 is regret about the past.

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