반말? 존댓말?

Hoya sagt 카드로 계산할게.

Sori sagt 카드로 계산할게요.

The staff are strangers, so the ending stays 해요체. 계산할게 (without 요) is casual speech for a friend — easy to slip into right after talking to Bori.

Lerne es in Leben in Korea · Einheit 3

Hoya sagt ㅇㅇ 알겠어.

Sori sagt 네, 알겠어요.

Sori-ssaem is your teacher, so the ending stays 해요체 with 요. ㅇㅇ and 알겠어 are for a friend you speak casually with, even in a text.

Lerne es in Leben in Korea · Einheit 4

Hoya sagt 계좌를 만들고 싶어.

Sori sagt 계좌를 만들고 싶은데요.

The clerk is a stranger: use 해요체. 싶어 is 반말, for Bori; at a counter say 싶은데요 (or 싶어요).

Lerne es in Leben in Korea · Einheit 7

Hoya sagt 일요일에 놀러 갈게.

Sori sagt 일요일에 놀러 갈게요.

She speaks 반말 to you because she is older. You are younger and she is your friend's parent, so you answer in 해요체 — and you keep it. 반말 (갈게) is for Bori.

Lerne es in Leben in Korea · Einheit 8

Hoya sagt 빨래방 오른쪽이야.

Sori sagt 빨래방 오른쪽이에요.

You kept the ending you had just used with Bori. The ending follows the person you are speaking to now: Bori gets 반말, the rider gets 해요체.

Lerne es in Leben in Korea · Einheit 5

Hoya sagt 안녕히 가세요.

Sori sagt 안녕히 계세요.

You say 가세요 ('go well') to someone who is leaving, and 계세요 ('stay well') to someone who is staying. You are leaving and the clerk stays, so you say 안녕히 계세요.

Lerne es in Leben in Korea · Einheit 2