"My father already fired that man."
Translation:우리 아버지가 그 남자를 벌써 해고하셨어요.
in many cases 벌써 and 이미 have the same meaning, you can use both for example: 그는 벌써 일을 끝냈다 = 그는 이미 일을 끝냈다 He already finished the work But unlike 이미, '벌써' can imply the fact that the situation happened much earlier than the speaker expected 진아가 벌써 다 했어? (Has Jina already finished it?) this sentence shows that speaker is surprised because he/she didn't expect that Jina can finish the task this early.