Let's learn about "멀어?"

거기 멀어? : Is it far?

얼마나 멀어? : How far is it?

[other expressions]

- 거기 머니? (to younger people or friends)

- 거기 머나? (to younger people or friends)

- 거기 머냐? (to younger people or friends)

- 거기 먼가? (to younger people or friends)

- 거기 멀어? (to younger people or friends)

- 거기 머나요? (honourific by ‘-요’)

- 거기 먼가요? (honourific by ‘-요’)

- 거기 멀어요? (honourific by ‘-요’)

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

- 얼마나 머니? (to younger people or friends)

- 얼마나 머나? (to younger people or friends)

- 얼마나 머냐? (to younger people or friends)

- 얼마나 먼가? (to younger people or friends)

- 얼마나 멀어? (to younger people or friends)

- 얼마나 머나요? (honourific by ‘-요’)

- 얼마나 먼가요? (honourific by ‘-요’)

- 얼마나 멀어요? (honourific by ‘-요’)

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

[explanations]

* 거기 : there

* -까지 : a place suffix means "till; to"

* 얼마나 : how much <— 얼마(how) + -나(a suffix indicates a sign of a guess or a conjecture; approximately)

* 먼 : far (from here)

* 멀다 : [ㄹ 불규칙(irregular)] be far

* 멀게 : an adverb form of 먼

* 머니? : 멀(the stem of 멀다; ㄹ erased before ㄴ) + -니?(a non-honourific interrogative verb ending suffix)

* 머나? : 멀(the stem of 멀다; ㄹ erased before ㄴ) + -나?(a non-honourific interrogative verb ending suffix)

* 머냐? : 멀(the stem of 멀다; ㄹ erased before ㄴ) + -냐?(a non-honourific interrogative verb ending suffix)

* 먼가? : 멀(the stem of 멀다; ㄹ erased before ㄴ) + -ㄴ가?(a non-honourific interrogative verb ending suffix)

* 멉니까? : 멀(the stem of 멀다; ㄹ erased before ㅂ) + -ㅂ니까?(an honourific interrogative verb ending suffix by '-ㅂ')

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

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

* a verb + -ㅂ니까? : an honourific interrogative verb ending suffix has an honourific by ‘-요’ / ‘-ㅂ’