jihacheol chulgu apeseo chingureul gidarigo isseoyo.

Literally, it breaks down like this:

• 지하철 = subway, metro
• 출구 = exit
• 앞 = front
• 앞에서 = at/in front of

So 지하철 출구 앞에서 means in front of the subway exit or at the front of the subway exit.

Because 에서 marks the place where an action happens.

In this sentence, the action is waiting, and that action is happening in front of the subway exit, so 에서 is natural.

A simple way to think about it:

• 에 = to, at, in — often for destination, existence, or time
• 에서 = at/in — where an action takes place

So:

• 출구 앞에 있어요 = I am at/in front of the exit
• 출구 앞에서 기다리고 있어요 = I am waiting in front of the exit

Because 기다리다 takes a direct object in Korean.

In English, we say wait for a friend, with for.
But in Korean, you simply wait a friend grammatically, so the noun takes the object particle 을/를.

• 친구를 기다리다 = to wait for a friend
• 버스를 기다리다 = to wait for the bus

So 친구를 is completely normal here.

It is the verb 기다리다 plus the grammar -고 있다, which often describes an action in progress.

Breakdown:

• 기다리다 = to wait
• 기다리고 있다 = to be waiting
• 기다리고 있어요 = polite form of to be waiting

So here it means the speaker is currently in the middle of waiting.

Yes, 기다려요 is possible, but the nuance is a little different.

• 기다려요 = wait / am waiting
• 기다리고 있어요 = am in the process of waiting / am waiting right now

In everyday conversation, both can work, but 기다리고 있어요 makes the ongoing situation more explicit. It sounds very natural if someone asks where you are or what you are doing right now.

Korean often omits the subject when it is obvious from context.

So this sentence could be understood as:

• 저는 지하철 출구 앞에서 친구를 기다리고 있어요.
• I am waiting for a friend in front of the subway exit.

But if the speaker is already clear, Korean usually leaves 저는 out.

This is very common and natural.

Korean word order is more flexible than English, but the usual neutral order is:

place + object + verb

So:

• 지하철 출구 앞에서 = place
• 친구를 = object
• 기다리고 있어요 = verb

That makes this sentence sound very natural.

You could sometimes change the order for emphasis, but this version is the most straightforward.

있어요 is in the 해요체 style, which is the standard polite conversational form.

That means this sentence is polite and appropriate in many everyday situations.

Compare:

• 기다리고 있어요 = polite
• 기다리고 있어 = casual, plain conversation with friends
• 기다리고 있습니다 = more formal

So the sentence sounds polite but not stiff.

It is usually understood as:

• 앞 = front
• 에서 = location particle

So grammatically, it is 앞 + 에서, even though it is written together as 앞에서.

This happens often in Korean with nouns plus particles.

Usually 지하철 refers to an urban rail system like a subway or metro.

Depending on the city or translation style, it could be rendered as:

• subway
• metro
• sometimes underground

But subway is the most common English gloss for learners.

Yes. Korean often does not mark articles like a or the, and possession is often left unstated when obvious.

So 친구를 기다리고 있어요 could mean:

• I’m waiting for a friend
• I’m waiting for my friend

Context decides which sounds best in English.

Yes, very natural.

It sounds like something you would say when answering a question such as:

• Where are you?
• What are you doing?
• Why are you late?

It is a normal, everyday Korean sentence with natural word choice and grammar.