마시던

In a sentence

• 나는 내가 마시던 커피를 다시 마셨다.

  I drank the coffee I was drinking again.

  In this sentence, '마시던' is used to describe the coffee that I had been drinking before.

• 마시던 차를 책상 위에 두고 잠시 자리를 비웠다.

  I left the tea I was drinking on the desk and stepped away for a moment.

  Here, '마시던' refers to the tea that I was previously drinking and had not finished.

• 친구가 마시던 주스를 내가 대신 마셨다.

  I drank the juice my friend was drinking instead.

  '마시던' is utilized to indicate the juice that the friend was in the process of drinking or had been drinking before.