KOREAN VERB

끼치다

to cause (trouble, a bother), to have an effect

Conjugation

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현재 · now and habits: polite, formal and casual speech

Form	Polite	Formal	Casual
AffirmativeI cause
NegativeI don’t cause

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI caused
NegativeI didn’t cause

미래 · plans and guesses: -(으)ㄹ 거예요

Form	Polite	Formal	Casual
AffirmativeI will cause
NegativeI won’t cause

높임말 · to or about an elder: the -시- forms

Form	Polite	Formal
PresentI cause (respectfully)
PastI caused (respectfully)
FutureI will cause (respectfully)

연결 어미 · and, so, if, because, but: joining two sentences

명령형 · -(으)세요, -(으)십시오, the casual form, -지 마세요

One sentence for each tense, the way people say it.

Present

늦은 밤 소음은 이웃에게 피해를 끼쳐요.

Noise late at night causes harm to the neighbours.
Past

그동안 폐를 많이 끼쳤어요, 죄송합니다.

I've been a lot of trouble all this time, I'm sorry.
Future

이 결정은 회사에 큰 영향을 끼칠 거예요.

This decision will have a big effect on the company.
Honorific

선생님은 제 인생에 큰 영향을 끼치셨어요.

My teacher had a big influence on my life.
Connectives

남에게 폐를 끼치고 사과도 안 했어요.

He was a bother to others and didn't even apologise.
Requests and commands

식당에서 다른 손님들에게 폐 끼치지 마세요.

Don't bother the other guests in the restaurant.

폐를 끼치다 is to be a bother to someone, and 영향을 끼치다 is to have an effect, good or bad.

The lessons that teach a form of it, and how they say it.

Advanced Level 1 · 폐 끼치기 싫대요.

The same pattern, on other verbs: verb.