gyeongchari gyotongsago hyeonjange baro wasseoyo.

이 is the subject marker. It shows that 경찰 is the thing doing the action.

• 경찰이 = the police / a police officer as the subject
• In this sentence, the police are the ones who came

Korean often marks roles with particles instead of relying mostly on word order like English does.

A learner may also wonder why it is not 경찰은.

• 경찰이 simply marks the subject
• 경찰은 would add a topic or contrast feeling, like as for the police...

So 경찰이 교통사고 현장에 바로 왔어요 is a neutral way to say that the police came.

교통사고 현장 is a noun phrase made of:

• 교통사고 = traffic accident
• 현장 = scene, site

Together, 교통사고 현장 means the scene of the traffic accident or traffic accident scene.

Korean often puts nouns next to each other like this to create compound noun phrases. English does something similar in phrases like:

• school bus
• computer screen
• accident scene

So there is no need for a particle between 교통사고 and 현장 here.

This is a very common question.

• 에 often marks a destination or endpoint of movement
• 에서 often marks the place where an action happens

Since 오다 means to come, the sentence is talking about movement to a place:

• 현장에 왔어요 = came to the scene

If you said 현장에서, it would sound like the scene is the place where some action occurred, not the destination of coming.

Compare:

• 경찰이 현장에 왔어요 = The police came to the scene
• 경찰이 현장에서 조사했어요 = The police investigated at the scene

바로 usually means something like:

• right away
• immediately
• directly

In this sentence, it means the police came immediately or right away.

So the feeling is that they did not delay.

바로 is an adverb, so it describes the action 왔어요.

바로 is an adverb, and adverbs in Korean often come before the verb they modify.

So:

• 바로 왔어요 = came immediately

That said, Korean word order is somewhat flexible, and adverbs can sometimes move around for emphasis, but placing 바로 before the verb is very natural and common.

왔어요 comes from the verb 오다, which means to come.

Breakdown:

• 오다 = to come
• 왔- = past tense stem, meaning came
• -어요 = polite ending

So 왔어요 means came in polite speech.

It is a very common everyday polite form.

Depending on context, 왔어요 can be translated in a few natural ways in English:

• came
• has come
• arrived

In Korean, the past tense often covers meanings that English splits up differently. So the best translation depends on the situation.

In this sentence, natural English could be:

• The police came to the traffic accident scene right away.
• The police arrived at the traffic accident scene immediately.

All of these fit the Korean well.

It is in polite Korean, but not the most formal style.

• 왔어요 = polite, everyday style
• 왔습니다 = more formal, often used in news, announcements, or official speech

So this sentence sounds respectful and normal in conversation, but not stiff or highly formal.

Compare:

• 경찰이 교통사고 현장에 바로 왔어요. = polite everyday speech
• 경찰이 교통사고 현장에 바로 왔습니다. = more formal

Yes. 경찰 can refer to:

• the police in general
• a police officer
• police officers, depending on context

Korean often does not mark singular and plural as clearly as English does unless needed.

So 경찰이 왔어요 could mean:

• a police officer came
• the police came

The context usually makes it clear.

If you really want to emphasize plural, you might sometimes see 경찰들이, but Korean often does not need that.

Korean does not have articles like English a, an, and the.

So nouns like 경찰, 교통사고 현장 do not need separate words for that.

Whether the meaning is:

• a police officer
• the police
• the accident scene
• an accident scene

depends on context.

This is very normal in Korean, and learners get used to filling in the most natural English article based on the situation.

Not completely. Korean word order is more flexible than English because particles show each word’s role.

The basic sentence is:

• 경찰이 교통사고 현장에 바로 왔어요

But you may also hear variations such as:

• 경찰이 바로 교통사고 현장에 왔어요
• 교통사고 현장에 경찰이 바로 왔어요

These can sound slightly different in emphasis, but the core meaning stays similar.

The most important thing is that:

• 경찰이 still marks the subject
• 현장에 still marks the destination

You could, but 교통사고 현장 is more natural here.

• 교통사고 현장 is the usual compact noun phrase
• 교통사고의 현장 sounds more explicit and sometimes more formal or literary

In everyday Korean, noun + noun combinations are very common, so 교통사고 현장 is the normal choice.

In casual, non-polite speech, you could say:

• 경찰이 교통사고 현장에 바로 왔어.

The only main change is the ending:

• 왔어요 → 왔어

This casual form is used with close friends, younger people, or in situations where polite speech is not needed.

So the levels are:

• 왔어 = casual
• 왔어요 = polite
• 왔습니다 = formal