Let's learn about "바빠요?"

바빠? : Are you busy?

[other expressions]

- 바쁘니? (to younger people or friends)

- 바쁘나? (to younger people or friends)

- 바쁘냐? (to younger people or friends)

- 바빠? (to younger people or friends)

- 바뻐? (to younger people or friends)

- 바쁜가? (to younger people or friends)

- 바쁘나요? (honourific by ‘-요’)

- 바빠요? (honourific by ‘-요’)

- 바뻐요? (honourific by ‘-요’)

- 바쁜가요? (honourific by ‘-요’)

- 바쁩니까? (formal; more honourific by ‘-시’)

[explanations]

* 바쁜 : busy

* 바쁘다 : be busy

* 바빠? : 바쁘(the stem of 바쁘다; 으 erased before 아) + -아?(a non-honourific interrogative verb ending suffix)

* 바뻐? : 바쁘(the stem of 바쁘다; 으 erased before 아) + -어?(a non-honourific interrogative verb ending suffix)

* 바쁜가? : 바쁘(the stem of 바쁘다) + -ㄴ가?(a non-honourific interrogative verb ending suffix)

* 바쁩니까? : 바쁘(the stem of 바쁘다) + -ㅂ니까?(an  honourific interrogative verb ending suffix)

* a verb + -니? / -나? / -냐? / -ㄴ가? / -아? / -어? : a non-honourific interrogative verb ending suffix

* a verb +  -나? / -ㄴ가? / -아? / -어? + -요 : an honourific verb ending suffix

* a verb + -ㅂ니까? : an honourific interrgative verb ending suffix by ‘-ㅂ-‘