sueobi kkeutnago naseo haksaengdeuri gyosireseo nawayo.

After class ends, the students come out of the classroom.

Breakdown of sueobi kkeutnago naseo haksaengdeuri gyosireseo nawayo.

• ~이: subject particle
• ~에서: location particle
• ~들: plural marker
• 학생: student

Questions & Answers about sueobi kkeutnago naseo haksaengdeuri gyosireseo nawayo.

Why are there two nouns with 이/가 in this sentence: 수업이 and 학생들이?

Because the sentence has two clauses, and each clause has its own subject.

• 수업이 끝나고 나서 = after the class ends
• 학생들이 교실에서 나와요 = the students come out of the classroom

So:

• 수업이 is the subject of 끝나다
• 학생들이 is the subject of 나오다

This is completely normal in Korean.

What does 끝나고 나서 mean exactly?

It means after ending or after it ends.

It comes from:

• 끝나다 = to end, to be over
• -고 나서 = after doing something

So 끝나고 나서 means after the class ends, and then...

The -고 나서 part emphasizes that the first action is completed before the second one happens.

Is 끝나고 나서 redundant? Why not just say 끝나고?

It can feel a little repetitive to English speakers, but in Korean it is very natural.

• 끝나고 = ending, and then / after ending
• 끝나고 나서 = after it has ended

Both are possible, but -고 나서 makes the sequence clearer and a bit more explicit.

So:

• 수업이 끝나고 학생들이 나와요 = okay
• 수업이 끝나고 나서 학생들이 나와요 = also okay, with a stronger sense of after that is finished