Question

언제까지 와야 돼요? The -아/어야 되/하- structure attaches to verb stems and coveys the meaning of 'must' or 'have to'. The pattern combines the -아/어야 ('only if') ending and the verb 되/하- ('become'/'do'). The literal meaning of -아/어야 되/하-, which does not pass into translation in its original form, is 'only if you do ... it will do'.The pattern can occur preceded by the past tense marker changing the meaning to 'should have done' used when talking about failed obligations.

Accepted Answer

What time do I have to be here?

Front	언제까지 와야 돼요?
Back	What time do I have to be here?
Notes	The -아/어야 되/하- structure attaches to verb stems and coveys the meaning of 'must' or 'have to'. The pattern combines the -아/어야 ('only if') ending and the verb 되/하- ('become'/'do'). The literal meaning of -아/어야 되/하-, which does not pass into translation in its original form, is 'only if you do ... it will do'. The pattern can occur preceded by the past tense marker changing the meaning to 'should have done' used when talking about failed obligations.

아/어야 Meaning 되/하 Verb Pattern 언제까지 와야 돼요