sueobi kkeutnago naseo pianoreul yeonseuphaeyo.

subject particle

Breakdown of sueobi kkeutnago naseo pianoreul yeonseuphaeyo.

• ~를: object particle
• 수업: class
• 고 나서: after

Questions & Answers about sueobi kkeutnago naseo pianoreul yeonseuphaeyo.

Why isn’t there a subject like 저는 or 나는 in this sentence?

Korean often leaves out the subject when it is already clear from context. So 수업이 끝나고 나서 피아노를 연습해요 can naturally mean:

• I practice the piano after class ends
• I’ll practice the piano after class ends

If you want to make the subject explicit, you can say:

• 저는 수업이 끝나고 나서 피아노를 연습해요.

That sounds fine too, but Korean usually prefers omission when possible.

Why is it 수업이, not 수업을?

Because 끝나다 means to end / to be over, and it is an intransitive verb. That means the thing that ends is marked as the subject, not the object.

So:

• 수업이 끝나다 = the class ends
• not 수업을 끝나다

If you want to say to end/finish the class as an action done by someone, you would use 끝내다, which is transitive:

• 수업을 끝내고 나서... = after finishing class...

So in your sentence, the class itself is ending, which is why 이 is used.

What does 끝나고 나서 mean exactly?