KOREAN VERB

서명하다

to sign (a document)

Conjugation

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

Form	Polite	Formal	Casual
AffirmativeI sign
NegativeI don’t sign

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI signed
NegativeI didn’t sign

미래 · plans and guesses: -(으)ㄹ 거예요

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

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

Form	Polite	Formal
PresentI sign (respectfully)
PastI signed (respectfully)
FutureI will sign (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

계약서에는 두 사람이 모두 서명해요.

Both people sign the contract.
Past

어제 새 아파트 계약서에 서명했어요.

Yesterday I signed the contract for the new apartment.
Future

내용을 다 읽은 다음에 서명할 거예요.

I'll sign after I've read everything.
Honorific

박 여사님, 마지막 장에도 서명하셨어요?

Mrs. Park, did you sign the last page too?
Connectives

여기에 서명하면 계약이 바로 시작돼요.

Once you sign here, the contract starts right away.
Requests and commands

읽어 보시고 이 두 곳에 서명하십시오.

Please read it and sign in these two places.

서명 is the signature; 사인하다 is the same thing said casually, and 도장을 찍다 is to stamp a seal instead.

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

Advanced Level 1 · 그리고 증인 두 명이 여기 서명해요. · 친구 둘이 어젯밤에 서명했어요.

Fluency Level 3 · 브룩스 일라이 씨? 여기 서명하십시오.

The same pattern, on other verbs: 하다 verb.