Learn Hardcore Korean: jip sopa-e anja yeonghwareul bogeona eumageul deureoyo. - I sit on the couch at home and either watch a movie or listen to music.

In this phrase, 집 directly modifies 소파 like an adjective ("home sofa"). When one noun modifies another, you don’t insert a particle between them. Only 소파 takes the locative 에 to mark “on/at the sofa.”

What does 에 in 소파에 indicate?

The particle 에 marks a location where an action happens. Here, 소파에 앉아 means “sit on the sofa” (literally “to the sofa,” indicating position).

Why is the verb 앉아 used instead of 앉는다 or 앉아서?

앉아 is the verb stem 앉- plus -아, forming an adverbial connective ("sit and…"). It links actions in a casual way. You can also use 앉아서, which is a more explicit connective form meaning “while sitting.” Both are correct; 앉아 is simply shorter and more colloquial.

What is the role of -거나 in 보거나 음악을 들어요?

The connective ending -거나 links two verbs to express alternatives, meaning “do A or do B.” So 영화를 보거나 음악을 들어요 translates to “watch a movie or listen to music.”

Can I use -나 instead of -거나 to mean “or”?

While -나 can connect verbs to mean “or,” it’s less common in everyday spoken Korean. -거나 is the standard way to list alternative verbs in conversation. Using -나 may sound literary or old-fashioned.

Why does 듣어요 come from 듣다 instead of 듣+어요?

듣다 is an irregular verb. The ㅅ in the stem drops before a vowel, and the vowel ㅡ changes to ㅓ when followed by -어요. Hence 듣 + 어요 becomes 들어요.

Why is there no subject like 저는 in the sentence?

Korean often omits the subject when it’s clear from context. Here, the speaker (“I”) is implied by the verb endings and situation. You can add 저는 at the start for emphasis or clarity:
저는 집 소파에 앉아 영화를 보거나 음악을 들어요.

Can I use 앉으면서 instead of 앉아 here?

Yes. 앉으면서 is another adverbial form meaning “while sitting.” You could say:
소파에 앉으면서 영화를 보거나 음악을 들어요
This is slightly more formal/explicit but has the same overall meaning.