Learn Hardcore Korean: sae osgeorireul saseo osjang ane georeo nwasseoyo. - I bought new hangers and hung them inside the wardrobe.

-아서/어서 is a verb connector that links two actions in sequence. In 사서, it literally means “having bought (it),” so the speaker is saying “(I) bought it and then did the next action.”

Could I say 샀어요 instead of 사서 here?

You could say 새 옷걸이를 샀어요 to mean “I bought a new hanger,” but that’s a complete thought on its own. Using 사서 ties it to the next action (“hung it in the closet”). If you remove -어서, you’d need a new sentence or conjunction to connect buying and hanging.

What is the purpose of -어 놓다, as in 걸어 놓다?

-어 놓다 adds the nuance of doing something and leaving it in that resulting state. 걸어 놓다 means “to hang something up and leave it hanging,” emphasizing the finished, residual condition.

How is 걸어 놓다 different from simply 걸다?

걸다 just means “to hang” (e.g., you hang clothes). 걸어 놓다 highlights that you’ve hung something up for later use or simply left it hanging there—focusing on the completed action plus its ongoing result.

Why is 옷걸이 marked with -를 in 옷걸이를?

-을/를 marks the direct object of a verb. Here, 옷걸이 (“hanger”) is what you bought and hung, so it takes -를 to show it’s the object of both 사다 (to buy) and 걸다 (to hang).

Why is it 옷장 안에 instead of just 옷장에?

옷장 안에 specifically means “inside the closet.” If you said 옷장에, it could mean “to the closet” or “on the closet” (depending on context). Adding 안에 removes ambiguity by stressing the interior location.

Why isn’t there an explicit subject in this sentence?

Korean often omits the subject when it’s clear from context. Here, the speaker (“I” or “we”) is obvious, so there’s no need to say 제가 or 우리가.

What nuance does adding 새 bring in 새 옷걸이?

새 means “new.” Placed before 옷걸이, it tells us the hanger is newly purchased (not used or old). It’s just an ordinary adjective modifying the noun.