Let's learn about "누구세요?"

누구세요? : Who are you?

[other expressions]

- 누구니? (to younger people or friends)

- 누구냐? (to younger people or friends)

- 누구야? (to younger people or friends)

- 누군데? (to younger people or friends)

- 누군데요? (formal; honourific by ‘-ㅂ’)

- 누구입니까? (formal; honourific by ‘-ㅂ’)

- 누구세요? (more honourific by '시')

- 누구셔요? (more honourific by '시')

- 누구십니까? (more honourific by '시')

[explanations]

* 누구 : who; whom

<The lefts are made from Rights by erasing "-이-">

* 누구니? <-- 누구이니?

* 누구냐? <-- 누구이냐?

* 누구야? <-- 누구이야?

* 누군데? <-- 누구인데?

* 누군데요? <-- 누구인데요?

* 누구세요? <-- 누구이세요?

* 누구셔요? <-- 누구이세요?

* a noun + -니? / -냐? / -야? / -ㄴ데? : a non-honourific interrogative form of 이다

* a noun + -ㄴ데? + -요 : an honourific verb ending suffix

* a noun + -입니까? / -세요? / -셔요? / -십니까? : an honourific interrgative form of 이다 by ‘-ㅂ’ / '-요' / '시'