gabang ane yeogwongwa bihaenggi pyoga deureo isseoyo.

안에 means inside or in.

• 가방 = bag
• 안 = inside
• 에 = location particle, often meaning in / at / on depending on context

So 가방 안에 literally means inside the bag.

A useful comparison:

• 가방 안 = the inside of the bag
• 가방 안에 = in the bag / inside the bag

In this sentence, 에 is needed because the phrase is showing where the passport and plane ticket are.

The particle 에 marks the location where something exists or is located.

In this sentence, the things are located inside the bag, so Korean uses 에:

• 가방 안에 = in the bag
• 책상 위에 = on the desk
• 집에 = at home

This works especially often with 있다 and related expressions, because they describe existence or location.

So the structure is roughly:

[place] + 에 + [thing] + 있다 / 들어 있다

들어 있어요 comes from 들어 있다.

It literally has the sense of has gone in and is in that state, so in natural English it often means:

• is inside
• is contained in
• is in there

So 가방 안에 여권과 비행기 표가 들어 있어요 means the passport and plane ticket are inside the bag.

Compared with plain 있어요, 들어 있어요 feels a little more specific: it emphasizes that something is contained inside something else.

For example:

• 가방 안에 여권이 있어요. = There is a passport in the bag.
• 가방 안에 여권이 들어 있어요. = The passport is inside the bag / contained in the bag.

The second one sounds a bit more like it’s in there rather than just it exists there.

Both are possible, but they are slightly different in feel.

• 있어요 = is there / exists
• 들어 있어요 = is inside / is contained inside

So:

• 가방 안에 여권과 비행기 표가 있어요.
  = The passport and plane ticket are in the bag.

• 가방 안에 여권과 비행기 표가 들어 있어요.
  = The passport and plane ticket are inside the bag.

The version with 들어 있어요 highlights the idea of being put into the bag or contained within it. It is a very natural choice when talking about things inside containers, bags, boxes, pockets, and so on.

Because the passport and plane ticket are not being acted upon here. They are the things that are in the bag, so Korean marks them with 가 as the subject of the existence/state.

• 여권과 비행기 표가 들어 있어요.
  = The passport and plane ticket are inside.

If you used 를, it would suggest that someone is putting them in or doing something to them, which would require a different verb.

For example:

• 여권과 비행기 표를 가방 안에 넣었어요.
  = I put the passport and plane ticket in the bag.

So:

• 가 / 이 with 있다 / 들어 있다 for what exists or is located
• 를 / 을 with action verbs like 넣다 for what is being acted on

과 means and.

It connects 여권 and 비행기 표:

• 여권과 비행기 표 = passport and plane ticket

A few important notes:

• 과 is usually used after nouns without a final vowel-like ending? Actually, more precisely:
  • 과 is used after nouns ending in a consonant
  • 와 is used after nouns ending in a vowel

Examples:

• 책과 연필 = book and pencil
• 사과와 바나나 = apple and banana

Since 여권 ends in a consonant sound, 과 is correct.

In everyday speech, people also often use:

• 하고
• (이)랑

So you may also hear:

• 여권하고 비행기 표
• 여권이랑 비행기 표

Because the two nouns are being treated together as one combined subject:

• 여권과 비행기 표가 = the passport and plane ticket

Korean often puts the subject particle only once, after the whole noun phrase.

This is very normal.

You could think of it like this:

• [여권과 비행기 표]가 들어 있어요
• [passport and plane ticket] are inside

Putting 가 after each noun would sound unnatural in this kind of sentence.

Literally:

• 비행기 = airplane
• 표 = ticket

So 비행기 표 literally means airplane ticket, which in natural English is usually plane ticket or flight ticket.

Korean often makes noun combinations like this:

• 버스 표 = bus ticket
• 기차 표 = train ticket
• 영화 표 = movie ticket

So 비행기 표 is a very common and straightforward noun combination.

You will often see 비행기 표 written as two words, and that is a standard, learner-friendly way to write it.

In real life, spacing in Korean compound nouns can sometimes vary, and you may also come across forms written together in some contexts. But for learning purposes, 비행기 표 is perfectly natural and easy to understand.

The important thing is to recognize that it functions as one meaning unit: plane ticket.

A sentence does not always need 은/는.

Here, the sentence is simply describing what is inside the bag, so the subject phrase 여권과 비행기 표가 works well.

Using 가 here feels natural because it presents the items that are there.

If you changed the sentence, you could use 은/는 for contrast or topic:

• 여권과 비행기 표는 가방 안에 들어 있어요.
  = As for the passport and plane ticket, they are in the bag.

This version sounds more like you are specifically talking about those items, perhaps contrasting them with something else.

So:

• 가/이 often presents or identifies what exists/is the case
• 은/는 often marks the topic or adds contrast

Yes. In everyday writing, you will often see 들어있어요 written together.

Both are commonly seen:

• 들어 있어요
• 들어있어요

For learners, writing it as 들어 있어요 can be helpful because it shows the structure more clearly:

• 들어
  • 있어요

But in normal Korean text, 들어있어요 is very common.

The same applies to dictionary form:

• 들어 있다
• often seen as 들어있다 in practical writing

있어요 is the polite informal style, sometimes called the -요 form.

It is very common in everyday conversation and is appropriate in many situations, such as:

• speaking politely to someone you do not know well
• speaking to a teacher, coworker, customer, or stranger
• neutral polite conversation

The less polite plain form would be:

• 들어 있어 / 들어있어

The more formal style would be:

• 들어 있습니다

So this sentence is polite and natural for everyday use.

Yes. 가방 속에 is also natural.

Both can mean inside the bag, but there is a slight nuance:

• 안에 = inside
• 속에 = inside, inner part, deep within

In many everyday situations, they are interchangeable.

Examples:

• 가방 안에 여권이 있어요.
• 가방 속에 여권이 있어요.

Both mean The passport is in the bag.

For a learner, 안에 is a very basic and useful form to know, and it fits this sentence perfectly.

The structure is:

[place] + 에 + [things] + 가 + 들어 있어요

In this sentence:

• 가방 안에 = in the bag
• 여권과 비행기 표가 = the passport and plane ticket
• 들어 있어요 = are inside / are contained

So the overall pattern is:

In the bag, the passport and plane ticket are inside.

Natural English rearranges that to:

The passport and plane ticket are in the bag.

This is a very common Korean pattern for describing location:

• 상자 안에 선물이 들어 있어요.
  = There is a present in the box.
• 주머니 안에 돈이 들어 있어요.
  = There is money in the pocket.