geu bubuui ttareun eumageul johahaeseo pianoreul maeil yeonseuphaeyo.

그 literally means that, but in real sentences it often works like that/the when the listener already knows who is being talked about.

So 그 부부 can mean:

• that couple
• or more naturally in context, the couple

It does not always sound as strongly demonstrative as English that.

의 marks possession, similar to English 's or of.

So:

• 부부의 딸 = the couple's daughter
• literally, the daughter of the couple

In everyday speech, possessive 의 is often pronounced more like 에, even though it is still written 의.

은/는 is the topic marker, while 이/가 is the subject marker.

Here, 딸은 means the sentence is setting up the daughter as the topic and then saying something about her:

• As for the couple's daughter, ...

If you used 딸이, it would sound more like you are identifying the daughter as the subject in a more specific or contrastive way.

In a simple descriptive sentence like this, 은/는 is very natural.

Korean often leaves out pronouns when the meaning is already clear.

Once 딸은 has been introduced as the topic, Korean does not need to repeat she. Both parts of the sentence are understood to be about the daughter.

This is very normal in Korean.

Because 좋아하다 usually takes an object marked with 을/를.

So:

• 음악을 좋아하다 = to like music
• 영화를 좋아하다 = to like movies
• 고양이를 좋아하다 = to like cats

Even though English uses like differently, in Korean the thing you like is commonly marked as the object.

좋아해서 is 좋아하다 plus -아서/어서.

In this sentence, it means:

• because she likes music
• or she likes music, so ...

It connects the first idea to the second one and gives the reason for the second action.

Not always.

-아서/-어서 can:

• give a reason: because
• or simply connect actions: and / then

In this sentence, the causal meaning is the most natural one:

• she likes music, so she practices the piano every day

That is because the first clause explains why the second clause happens.

Because there are really two clauses here, and each clause has its own verb:

1. 음악을 좋아해서

   • verb: 좋아하다
   • object: 음악을

2. 피아노를 매일 연습해요

   • verb: 연습하다
   • object: 피아노를

So this is not one verb with two objects. It is two linked parts, and each verb has its own object.

Yes. That is natural Korean.

You can use 연습하다 with the thing being practiced:

• 피아노를 연습하다 = to practice the piano
• 발음을 연습하다 = to practice pronunciation
• 춤을 연습하다 = to practice dancing / a dance

Another common pattern is:

• 피아노 연습을 하다

Both are correct, but 피아노를 연습하다 is perfectly normal.

매일 is an adverb meaning every day.

Adverbs in Korean are fairly flexible, so these are all natural:

• 매일 피아노를 연습해요
• 피아노를 매일 연습해요

The basic meaning stays the same. The position can slightly change what feels more emphasized, but both are correct.

연습해요 is the polite present-tense form.

It comes from 연습하다 and uses the -아요/어요 polite ending. This style is:

• polite
• common in conversation
• less formal than 연습합니다

Compare:

• 연습해요 = polite, everyday
• 연습합니다 = more formal
• 연습해 = casual, informal

Both verbs end in 하다, and 하다 often changes to 해 when conjugated.

So:

• 좋아하다 → 좋아해요
• 좋아하다 + -서 → 좋아해서
• 연습하다 → 연습해요

This is a very common pattern with 하다 verbs:

• 공부하다 → 공부해요
• 운동하다 → 운동해요
• 준비하다 → 준비해요