KOREAN VERB

그러다

to do so, to be so (the verb behind should have, and then, and so)

Conjugation

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

Form	Polite	Formal	Casual
AffirmativeI do so
NegativeI don’t do so

과거 · finished actions: 갔어요, 갔습니다, 갔어

Form	Polite	Formal	Casual
AffirmativeI did so
NegativeI didn’t do so

미래 · plans and guesses: -(으)ㄹ 거예요

Form	Polite	Formal	Casual
AffirmativeI will do so
NegativeI won’t do so

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

Form	Polite	Formal
PresentI do so (respectfully)
PastI did so (respectfully)
FutureI will do so (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

민준 씨는 왜 요즘 그래요?

Why is Min-jun like that these days?
Past

어제도 그랬어요. 매일 늦게 와요.

He was like that yesterday too. He comes late every day.
Future

민준 씨는 내일도 아마 그럴 거예요.

Min-jun will probably be the same tomorrow.
Honorific

할머니는 가끔 그러세요. 걱정 마세요.

Grandma is like that sometimes. Don't worry.
Connectives

계속 그러면 김 선생님이 화내실 거예요.

If you keep doing that, Mr. Kim will get angry.
Requests and commands

여기서 그러지 마세요. 사람들이 봐요.

Don't do that here. People are watching.

그러다 stands for whatever was just said: 그래요? "is that so?", 그래서 "so", 그러면 "then", 그러니까 "that's why".
Its casual 그래 is also "okay": 그래, 가자 is "okay, let's go".