jwaseok baechidoreul dasi hwaginhaesseo.

좌석 배치도 is a compound noun:

• 좌석 = seat / seating
• 배치 = arrangement / placement
• 도 = diagram / chart / map

So 배치도 means something like layout diagram or arrangement chart, and 좌석 배치도 is a seating chart or seat layout.

A very common learner mistake is to think the final 도 is the particle meaning also. Here it is not a particle. It is part of the noun 배치도.

The full object here is 좌석 배치도 and it takes the object particle -를, so it becomes:

• 좌석 배치도
  • 를 → 좌석 배치도를

This marks 좌석 배치도 as the thing being checked.

So the structure is:

• 좌석 배치도를 = the seating chart
• 다시 = again
• 확인했어 = checked / confirmed

English often relies on word order, but Korean often uses particles like -을/를 to show what role a noun has in the sentence.

Because 확인 is a noun, and the dictionary verb is 확인하다:

• 확인 = confirmation / checking
• 확인하다 = to check / to confirm

Then it is conjugated into past casual speech:

• 확인하다
• → 확인했어

This happens because 하다 becomes 했어 in the past informal style.

You can think of it like this:

• 확인해 = check / am checking
• 확인했어 = checked

Many Korean verbs made from nouns work this way:

• 공부하다 → 공부했어
• 준비하다 → 준비했어
• 확인하다 → 확인했어

확인했어 is informal / casual speech. It is used with:

• close friends
• younger people
• children
• someone you are on casual terms with
• diary-like or internal narration

A more polite version would be:

• 좌석 배치도를 다시 확인했어요.

A more formal, written, or businesslike version could be:

• 좌석 배치도를 다시 확인했습니다.

So the meaning is basically the same, but the social tone changes.

Because Korean often omits the subject when it is clear from context.

So 좌석 배치도를 다시 확인했어 could mean:

• I checked the seating chart again
• We checked the seating chart again
• He/She checked the seating chart again

In real conversation, the listener usually understands who did it from the situation.

This is very normal in Korean. English usually requires a subject, but Korean often does not.

Yes, 다시 usually means again.

In this sentence, it means the speaker checked the seating chart one more time or re-checked it:

• 다시 확인했어 = checked again / checked once more / rechecked

A useful nuance:

• 다시 often suggests doing something anew or one more time
• it can sound a bit like again or once more
• in some contexts it can also mean back or anew, depending on the sentence

Here, again is the natural meaning.

Sometimes both can translate as again, but they are not always interchangeable.

• 다시 often means again / once more / re-
• 또 often means again / additionally / once more, but can feel more like repetition or also another time

In this sentence, 다시 확인했어 is the most natural choice because it suggests rechecking.

• 좌석 배치도를 다시 확인했어 = I checked the seating chart again / rechecked it

또 확인했어 is possible in some contexts, but it can sound more like:

• I checked it again (yet again)
• I checked it another time

So for a simple rechecked meaning, 다시 is the safer and more natural word.

Usually yes, but context matters.

확인했어 is the past tense, so it means the checking action has already happened. Depending on context, it may sound like:

• I checked it
• I checked it again
• I’ve checked it again

Korean past tense does not map perfectly onto English past simple vs. present perfect. In everyday conversation, 확인했어 can cover both kinds of ideas, depending on the situation.

Korean spacing can be tricky, especially with compound nouns.

Here, 좌석 배치도 is commonly written as two noun units:

• 좌석
• 배치도

That is very natural.

You may also encounter similar expressions in signs, schedules, or documents where spacing can vary a little, but 좌석 배치도 is a standard and easy-to-understand form.

The important thing for learners is:

• 좌석 배치도 functions as one overall noun phrase
• 배치도 itself is already a single noun

Then the particle attaches to the whole phrase:

• 좌석 배치도를

Yes, you could, but the nuance changes.

• 확인했어 = checked / confirmed
• 봤어 = saw / looked at

So:

• 좌석 배치도를 다시 확인했어 sounds more like you looked at it carefully to verify something.
• 좌석 배치도를 다시 봤어 sounds more like you looked at it again.

If you want the idea of double-checking or making sure, 확인했어 is better.

Yes. Depending on context, both are possible translations.

• 다시 확인했어 can be a straightforward checked again
• in many situations, it naturally carries the sense of double-checked

That is because 확인하다 already has the sense of checking/confirming, and adding 다시 makes it feel like a repeated verification.

So if the context is about making sure everything is correct, double-checked is a very natural English rendering.