Let’s learn about "차이가 뭔데?"

차이가 뭐야? : What is difference?

[other expressions]

- 차이가 뭐니? = 차이가 무엇이니? (to younger people or friends)

- 차이가 뭐냐? = 차이가 무엇이냐? (to younger people or friends)

- 차이가 뭐야? = 차이가 무엇이야? (to younger people or friends)

- 차이가 뭔데? = 차이가 무엇인데? (to younger people or friends)

- 차이가 뭔데요? = 차이가 무엇인데요? (honourific by ‘-요’)

- 차이가 뭐예요? = 차이가 무엇이에요? (honourific by ‘-요’)

- 차이가 뭡니까? = 차이가 무엇입니까? (formal; honourific by ‘-ㅂ’)

[explanations]

* 차이 : [=다른 점] difference

* -이 : a particle makes 차이 the topic of the sentence after a word ends in a vowel

* 뭐 : a short form of 무엇(what)

* 이다 : be

* 뭔데? : 뭐 + -ㄴ데?

* 뭡니까? : 뭐 + -ㅂ니까

* a noun ends in a vowel + -니? / -냐? / -야? / -ㄴ데 = a noun ends in a consonant + -이니? / -이냐? / -이야? / -인데? : a non-honourific interrogative form of 이다

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

* a noun ends in a vowel + -ㅂ니까? = a noun ends in a consonant + -입니까? : a honourific interrogative form of 이다 by ‘-ㅂ’