nae baenangeun geogie isseo.

내 is the possessive form of 나 (I / me), so it means my.

• 나 = I
• 내 = my

So 내 배낭 means my backpack.

You may also learn 나의, which also means my, but in everyday speech 내 is much more common and natural.

• 나의 배낭 = my backpack
• 내 배낭 = my backpack

Both are correct, but 내 배낭 sounds more natural in most casual situations.

은 is the topic particle. It marks 배낭 as the topic of the sentence.

• 배낭은 = as for the backpack / the backpack

In this sentence, 내 배낭은 거기에 있어, the speaker is talking about my backpack and then saying where it is.

A very natural way to think about it is:

• As for my backpack, it is there.

The topic particle often gives a slight sense of contrast too, depending on context. For example, it could imply something like:

• My backpack is there (maybe not my phone, though)
• As for my backpack, it’s there

Korean topic particles change depending on whether the noun ends in a consonant or a vowel.

• after a consonant: 은
• after a vowel: 는

배낭 ends in the consonant ㅇ, so you use 은:

• 배낭은

Compare:

• 가방은 = as for the bag
• 의자는 = as for the chair

거기에 means there or more literally at/in that place.

It is made from:

• 거기 = there
• 에 = location particle meaning at / in / to

So:

• 거기 = there
• 거기에 = there / at that place

In Korean, the location particle 에 is often included when talking about where something exists.

Because 있다 often works with a location marked by 에 when it means to be located / to exist.

So the pattern is often:

• Noun + 은/는 + place + 에 + 있어요/있어
• The noun is at/in the place

Examples:

• 책은 책상 위에 있어요. = The book is on the desk.
• 고양이는 밖에 있어요. = The cat is outside.

In everyday speech, Koreans sometimes omit things when the meaning is obvious, but 거기에 있어 is the standard full form here.

Here, 있어 is the informal present form of 있다.

있다 can mean:

• to exist
• to be located
• to have

In this sentence, it means is there / is located there.

So 거기에 있어 means:

• is there
• is located there

This is different from the have meaning in a sentence like:

• 배낭이 있어. = I have a backpack / There is a backpack

The exact meaning depends on context.

Because Korean normally uses Subject/Topic + other information + Verb order.

So this sentence is structured like:

• 내 배낭은 = my backpack (topic)
• 거기에 = there
• 있어 = is

This verb-final order is very normal in Korean.

English:

• My backpack is there.

Korean:

• My backpack there is.

That may feel backwards at first, but it is one of the most important basic Korean sentence patterns to get used to.

Yes, you could say 내 배낭이 거기에 있어, but the nuance changes a little.

• 내 배낭은 거기에 있어 = As for my backpack, it’s there.
• 내 배낭이 거기에 있어 = My backpack is there.

Very roughly:

• 은/는 marks the topic and can sound more general or contrastive.
• 이/가 marks the subject more directly and can sound more specific, identifying, or new information.

In many everyday situations, both are possible. The difference is nuance, not a completely different core meaning.

있어 is the casual/informal polite-low style, used with:

• friends
• family
• people younger than you
• very casual situations

있어요 is the polite style.

So:

• 내 배낭은 거기에 있어. = casual
• 내 배낭은 거기에 있어요. = polite

If you are speaking to someone you do not know well, 있어요 is usually safer.

배낭 does mean backpack, but in everyday Korean, many people also say 가방 for a bag in general, and sometimes English-based loanwords appear depending on context.

Nuance:

• 배낭 = backpack, knapsack
• 가방 = bag, backpack, purse, schoolbag, etc. depending on context

So 내 배낭은 거기에 있어 is correct, but in real life someone might also say:

• 내 가방은 거기에 있어.

That could mean My bag is there, and depending on the situation it could refer to a backpack.

A natural pronunciation is close to:

• 내 배낭은 거기에 이써

A few helpful notes:

• 배낭은 is pronounced roughly bae-nang-eun
• 있어 is pronounced like 이써, not like the spelling might suggest if read letter by letter

That is because ㅆ gives a tense ss sound, and in speech 있어 sounds like 이써.

So the whole sentence may sound roughly like:

• nae bae-nang-eun geo-gi-e i-sseo

Yes, often you can.

Korean frequently omits words that are clear from context. If everyone already knows you are talking about your own backpack, you might simply say:

• 배낭은 거기에 있어.

That means:

• The backpack is there
• or My backpack is there, if context makes that clear

Korean relies on context much more than English does, so subjects, possessives, and even objects are often omitted when they are obvious.

Yes, but the meaning changes slightly.

Korean has a three-way distinction for location words:

• 여기 = here (near the speaker)
• 거기 = there (near the listener or previously mentioned place)
• 저기 = over there (away from both speaker and listener)

So:

• 거기에 있어 = It’s there.
• 저기에 있어 = It’s over there.

English often uses just there for both, but Korean makes this distinction more clearly.