Let's learn about "이해 안 돼"

이해 안 돼 = 이해 못하겠어 = 이해할 수 없어 : I don't get it

[other expressions]

- 이해 안  된다. (to younger people or friends)

- 이해 안  되네. (to younger people or friends)

- 이해 안  돼. (to younger people or friends)

- 이해 안  되네요. (honourific by '-요')

- 이해 안  돼요. (honourific by '-요')

- 이해 안  됩니다. (formal; honourific by '-ㅂ')

- 이해 못하겠다. (to younger people or friends)

- 이해 못하겠네. (to younger people or friends)

- 이해 못하겠어. (to younger people or friends)

- 이해 못하겠네요. (honourific by '-요')

- 이해 못하겠어요. (honourific by '-요')

- 이해 못하겠습니다. (formal; more honourific by '스')

- 이해 할 수 없다. (to younger people or friends)

- 이해 할 수 없네. (to younger people or friends)

- 이해 할 수 없어. (to younger people or friends)

- 이해 할 수 없네요. (honourific by '-요')

- 이해 할 수 없어요. (honourific by '-요')

- 이해 할 수 없습니다. (formal; more honourific by '스')

[explanations]

* 이해 : understanding

* 이해하다 = 이해를 하다 : understand

* -가 : a particle makes 이해 the topic of the sentence after a word ends in a vowel like "해"; this omitted

* 안 : this is equal to "not" in English

* 되다 : (1) become (2) can in the sentence

* -안 되다 : can not

* 된다 : present form of 되다 by '-ㄴ-'

* 돼 : 되(the stem of 되다; 이 + -어 contracted into 애) + -어(a non-honourific descriptive verb ending suffix)

* 됩니다 : 되(the stem of 되다) + -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* 이해 : understanding

* 이해하다 = 이해를 하다 : understand

* -를 : a particle makes 이해 objective after a word ends in a vowel like "해"; this omitted

* 못하다 : [=할 수 없다] cannot ; be unable ; be incapable ; [=…할 여유가 없다] cannot afford

* 못하겠다 : 못하(the stem of 못하다) + -겠(one's conjecture: one's will) + -다(a non-honourific descritive basic verb ending suffix)

* 못하겠습니다 : 못하겠(the stem of 못하겠다) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* 이해 : understanding

* 이해하다 = 이해를 하다 : understand

* 이해할 : 이해하(the stem of 이해하다) + -ㄹ(a suffix makes a verb future tense and attributive)

* 수 : way; method

* -가 : a particle makes 수 the topic of the sentence after a word ends in a vowel like "수"; this omitted

* 없다 : be not; does not exist; there is not

* -을 수(가) 없다 / -를 수(가) 없다 / -ㄹ 수(가) 없다 : can not; be incapable of

* 없습니다 : 없(the stem of 없다) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* a verb + -는다 / -네 / -어 : a non-honourific descriptive verb ending suffix

* a verb + -네 / -어 + -요 : an honourific verb ending suffix

* a verb + -습니다 / -ㅂ니다 : an honourific descriptive verb ending suffix by '스-' / '-ㅂ’