neohuiga meonjeo jeongsange ga.

너희 means you in the plural, like you guys or you all, in an informal way.

The 가 is the subject particle, so 너희가 means you guys as the subject of the sentence.

A very important nuance:

• 너희 is casual
• You would not normally use it to elders, teachers, customers, or other people you need to speak politely to

Both are possible in Korean, but they give slightly different nuance.

• 너희가 먼저 정상에 가: focuses on you guys as the ones who should go first
• 너희는 먼저 정상에 가: makes you guys the topic, often with a contrastive feeling, like as for you guys, go first

So 가 here sounds natural if the speaker is identifying who should go first.

먼저 is an adverb meaning first, before, or ahead of others.

In this sentence, it means that you guys should go before someone else or go ahead first.

It modifies the verb 가.

정상 means summit, peak, or top.

The particle 에 marks a destination with a movement verb like 가다.

So:

• 정상에 가다 = to go to the summit / top

With other kinds of verbs, 에 can also mean at a location, but with 가다, it usually marks where someone is going.

Both can be correct.

With 가다, both 에 and 으로 can be used for destinations, but the nuance can be slightly different:

• 에: marks the endpoint or destination
• 으로: can feel a bit more like toward or in the direction of

In everyday speech, both 정상에 가 and 정상으로 가 can sound natural. Here, 에 simply presents the summit as the destination.

가 is the plain, informal form.

That means the speaker is talking casually, probably to:

• friends
• younger people
• people they are close to

If the speaker wanted to be polite, they might say:

• 너희가 먼저 정상에 가요
• or more naturally in polite speech, often without 너희, just 먼저 정상에 가요

If speaking respectfully to the listener, 가세요 would be more appropriate.

It usually sounds like a casual instruction, suggestion, or directive.

Depending on tone and context, it could mean something like:

• You guys go first
• You guys go ahead to the top

It is not the strongest possible command form. A stronger, more direct imperative would be 가라, but that can sound harsh or forceful.

So 가 here is casual and natural, not necessarily aggressive.

Yes, Korean often omits subjects when they are obvious from context.

So if everyone already knows who is being told to go, the speaker could simply say:

• 먼저 정상에 가

Including 너희가 makes the subject explicit. It can add:

• clarity
• emphasis
• contrast with someone else

For example, it may imply you guys go first, and we’ll follow later.

The verb must come at the end, but the other parts are somewhat flexible.

For example, these can also work:

• 너희가 정상에 먼저 가
• 먼저 너희가 정상에 가

The original sentence,

• 너희가 먼저 정상에 가 sounds natural and clear.

In Korean, adverbs like 먼저 can move around more freely than in English, as long as the sentence remains easy to understand.