The verb 다니다 implies not only "to go" but also "to come back". BTW, There is greeting expressions with 다니다, and I think it would be very helpful for you to understand the concept of the verb. In English, people casually say like "I am going." And when it's spoken in Korean language with English way, sometimes it sounds like "I am not coming back." In Korean, it's very important to tell people yo..
Knowledge/Expressions in Korean 2023. 2. 21. 14:34