Let's learn about "나 시험 망쳤다"

나 시험 망쳤다 : I messed up my exam

[other expressions]

- 나 시험 망쳤다. (to younger people or friends)

- 나 시험 망쳤네. (to younger people or friends)

- 나 시험 망쳤어. (to younger people or friends)

- 저 시험 망쳤네요. (honourific by '요')

- 저 시험 망쳤어요. (honourific by '요')

- 저 시험 망쳤습니다. (formal; more honourific by '스')

[explanations]

* 망하다 : (1) (집안·회사 등이) fail, go under, go bankrupt, (informal) go broke, (informal) go bust; (회사 등이) go out of business (2) (as the form of 망할) will fail <-- 망(failure; bankruptcy) + 하다(do; become)

- 내 사업이 망했다 : My business has failed

- 망할 자식! : You bastard!

* 망치다 : [=잡치다] spoil; mar; ruin; destroy; damage; work[play] havoc with; make a mess[muddle] <-- 망(failure; bankruptcy) + 치다(hit; knock down; smite; smack; make something into a condition)

- 일생을 망치다 : blast one's career / make a wreck of one's life / be ruined for life

- 계획을 망치다 : frustrate[upset] a plan / throw a wet blanket over a project

- 몸을 망치다 : ruin[degrade] oneself / go wrong

- 난봉으로 몸을 망치다 : ruin oneself by dissipation

- 태풍 때문에 소풍 계획이 망쳐졌다 : The typhoon spoiled[ruined] our plans for a picnic

* 망쳤다 : past tense or present perfect form of 망치다 by '-였-'

* 망쳤습니다 : 망쳤(the stem of 망쳤다) + 스(a suffix makes a verb honourific) + -ㅂ니다(an honourific descriptive verb ending suffix)

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

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

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