Greetings in every life

How have you been?(lit. Have you been doing well?)

When meeting acquaintances, you can use 잘 지내셨어요?(jal ji nae syeot eo yo?) to ask how they have been recently. This expression also demonstrates your concern for their well-being. It can be used both with people you have not met for a long time and with people you meet  regularly. To reply to this question, you can simply say 잘 지냈어요(jal ji net sseo yo)(I have been doing fine). It is often used in colloquial conversation. If you happen to meet someone that you know, you can say 안녕하세요? first and then ask 잘 지내셨어요? By doing so, you will begin a conversation smoothly.

It's been a long time.

To express how glad you are meet someone you have not met for a long time, you can say 오랜만이에요(o ren man i e yo) or 오래간만이에요(o re gan man i e yo). These expressions are often used in everyday life. To respond, you can say 네(ne), 정말 오랜만이에요(Yes, it has been really long time).

How are you doing these days?

When asking your acquaintance about how they have been recently, you can use 요즘 어떻게 지내세요?(yo jeum eo ddu ke ji nae se yo?) It is often used in colloquial conversation but not with people you meet regularly. To reply, you can simply say 잘 지내요(jal ji ne yo)(I am doing fine) or you can explain your current situation. Between people who have not meet for some time, this expression allows one to begin a conversation by letting the other person know about recent changes in life.

Thanks to you, I'm doing fine.

덕분에 잘 지내요(deok bu ne jal ji nae yo) literally means that you owe your good fortune or good circumstances to the other person's care or concern. It Is derived from an Oriental mindset in which one's well-being is connected with the people around you in your life. It is a customary expression in Korea, so feel free to use it.

Good job./ I appreciate your hard work.(lit. You have made a great effort.)

수고 literally means putting in effort on a certain task. So when you say 수고하셨습니다(soo go ha seot sseum ni da), it means that you appreciate the effort that someone has put into job. It is mostly used to give thanks to someone who has provided a service to you. You can say 수고하셨습니다 when paying for the service. It can also be used to thank co-workers when leaving your office for the day.