어떻게 지내세요? (How have you been?) We use this greeting when we met someone who we already known been a while after you met her/him. If you met someone for the first time, you can say 만나서, 반갑습니다. or casually 반가워(요)
~지 말고 : When we ask someone to do the other work ex : 공부하지 말고 좀 쉬어 : stop studying and get some rest ~지 않고 : When we didn't do something to do and do the other work ex : 공부하지 않고 쉬었다 : I got some rest instead study
Got into a discuss of "I see" and "I know" as responses in a conversation, the subtle implicates of the two in English. Korean mentor offered to me that 알았어요 is similar to I know and 알겠어요 is similar to I see. Hmm. I see. Nods. I know. Uh-huh. Absolutely. Definitely. I understand. I see your point. I hear what you are saying. Is that a fact? I will get right on that.