yeonchulgaga daeboneseo juyeongwa joyeoneul hwaginhaesseo.

A natural breakdown is:

• 연출가가 = 연출가

  • 가
  • 연출가 = director / stage director / producer-director, depending on context
  • 가 = subject marker

• 대본에서 = 대본

  • 에서
  • 대본 = script
  • 에서 = in / from / within, often marking the place or source where something happens or is found

• 주연과 조연을 = 주연

  • 과
    • 조연
      • 을
  • 주연 = leading role / main actor
  • 조연 = supporting role / supporting actor
  • 과 = and
  • 을 = object marker, attached to the whole phrase 주연과 조연

• 확인했어 = 확인하다 in the past casual form

  • 확인하다 = to check, confirm, identify
  • 했어 = did / checked / confirmed

So the structure is basically:

[Subject] 연출가가 [Location/Source] 대본에서 [Object] 주연과 조연을 [Verb] 확인했어

가 is the subject particle. It marks 연출가 as the doer of the action.

So in this sentence:

• 연출가가 = the director is the one who checked/confirmed something

A learner often compares 가 with 는:

• 연출가가 focuses on who did it
• 연출가는 would sound more like as for the director... or would set up a topic

In a simple neutral statement like this, 가 is very natural because it straightforwardly marks the subject.

This is a very common question.

Here, 에서 shows the place or source within which the checking happened, or where the information was found.

So 대본에서 means something like:

• in the script
• from the script
• within the script

It suggests the director checked or identified the leading and supporting roles by looking at the script.

If you used 대본에, it would usually sound more like in/on the script in a static sense, not the same action-focused idea. With 확인하다, 에서 is more natural when the script is treated as the source of information.

과 means and. It links the two nouns:

• 주연과 조연 = the leading role and the supporting role

A useful point:

• 과 is typically used after a noun ending in a consonant
• 와 is used after a noun ending in a vowel

So:

• 주연 ends in a consonant sound, so 과 is correct

In everyday speech, people also often use 하고 for and, especially in conversation:

• 주연하고 조연을 확인했어

That sounds a bit more casual.

In Korean, when two nouns are joined by 와/과 or 하고, the object particle usually goes only once at the end of the whole noun phrase.

So:

• 주연과 조연을 = the leading role and the supporting role as one combined object

You do not normally say:

• 주연을과 조연을 ❌

The final 을 marks the entire phrase as the object of 확인했어.

확인하다 can mean several related things, depending on context:

• to check
• to confirm
• to verify
• sometimes to identify

In this sentence, it probably means something like:

• the director checked who the lead and supporting roles were in the script
• the director confirmed the lead and supporting roles from the script

So it is not just physically seeing the words. It carries the idea of examining or verifying information.

The base dictionary form is 확인하다.

It changes like this:

• 확인하다 → stem 확인하-
• past tense of 하다 becomes 했
• casual ending 어 is added

So:

• 확인하다 → 확인했어

This means checked / confirmed in casual speech.

If you want the polite version, it becomes:

• 확인했어요

If you want the formal written or formal spoken style:

• 확인했습니다

했어 is a casual, informal ending. It is used with:

• close friends
• younger people
• children
• people you are socially close to
• diary-like or conversational style

So this sentence sounds informal and conversational.

Compare:

• 연출가가 대본에서 주연과 조연을 확인했어.
  casual
• 연출가가 대본에서 주연과 조연을 확인했어요.
  polite everyday speech
• 연출가가 대본에서 주연과 조연을 확인했습니다.
  formal

The basic meaning stays the same; the speech level changes.

Yes. 확인했어 is past tense.

It means the checking/confirming happened and was completed:

• checked
• confirmed

So the sentence refers to an action that has already taken place.

If it were present/future-style plain casual, it might be:

• 확인해 = check / is checking / will check, depending on context

But 확인했어 clearly points to a completed action in the past.

Yes, Korean word order is flexible, as long as the particles stay attached correctly.

The original sentence is:

• 연출가가 대본에서 주연과 조연을 확인했어.

You could also say:

• 대본에서 연출가가 주연과 조연을 확인했어.

This still means basically the same thing.

Because Korean uses particles like 가, 에서, and 을, the grammatical roles are clear even if the order changes.

That said, the most neutral and easy-to-follow order is often:

• subject + place/source + object + verb

So the original sentence sounds very natural.

They can overlap, but they are not always exactly the same.

• 감독 is a very common word for director, especially in film, TV, and sports
• 연출가 emphasizes someone who handles staging, production, or direction, often in theater, broadcasting, or the performing arts

Depending on context, 연출가 can sound a bit more specialized or artistic than 감독.

So in this sentence, 연출가 suggests someone responsible for how a production is presented, and checking the roles in the script fits that context well.

Yes, potentially both, depending on context.

These words can refer to:

• the lead role and supporting role
• the lead actor and supporting actor

In this sentence, because of 대본에서 and the script context, many learners would naturally understand them as the roles found in the script.

But in real usage, Korean often allows this kind of role/person overlap, and context decides the exact meaning.

A straightforward polite version is:

• 연출가가 대본에서 주연과 조연을 확인했어요.

That is the same sentence with a polite ending.

In casual real-life speech, someone might also say:

• 연출가가 대본에서 주연이랑 조연을 확인했어요.

Here, 이랑 is a more conversational way to say and.

So if your goal is natural everyday Korean, 확인했어요 is the easiest polite version to remember.