gwangaegi ipjanggwoneul boyeo jwosseo.

이 is the subject marker. It marks 관객 as the subject of the sentence.

• 관객이 = the audience member / spectator as the subject
• So the sentence is saying that the audience member is the one who did the action of showing something.

A learner often compares 이/가 with 은/는:

• 관객이 입장권을 보여 줬어 = focuses more on who showed the ticket
• 관객은 입장권을 보여 줬어 = would make 관객 the topic, often with a contrast or topic-setting feeling

So 이 is very natural here if you are simply identifying the subject.

을 is the object marker. It marks 입장권 as the thing being shown.

• 입장권을 = the admission ticket as the object
• The action is showing, and the thing shown is the ticket

So the structure is:

• 관객이 = subject
• 입장권을 = object
• 보여 줬어 = showed

This is a very common Korean pattern: subject + object + verb.

보여 줬어 means showed in a casual past-tense form.

It comes from 보여 주다, which means to show.

You can think of it like this:

• 보이다 / 보여 relates to showing / letting be seen
• 주다 literally means to give
• Together, 보여 주다 means to show (to someone)

Then it changes into the past casual form:

• 보여 주다
• 보여 주었어
• 보여 줬어 (contracted, natural spoken form)

So 보여 줬어 = showed.

Yes, both 보여 줬어 and 보여줬어 are seen.

In standard spacing, auxiliary verbs are often separated:

• 보여 줬어

But in real life, many people also write it 붙여서 as:

• 보여줬어

Both are common, and the meaning is the same.

For a learner, the important point is:

• 보여 주다 is the underlying expression
• 줬어 is the past casual form of 주다

So whether you see 보여 줬어 or 보여줬어, it still means showed.

줬어 is in the casual / intimate speech level.

That means it would be used:

• with close friends
• with younger people
• in informal narration
• in casual conversation

It is not polite enough for many everyday situations with strangers or superiors.

Polite version:

• 관객이 입장권을 보여 줬어요.

More formal style:

• 관객이 입장권을 보여 주었습니다.

So 줬어 is informal and casual.

Yes. The sentence is in the past tense.

The past meaning comes from 줬어, which is the contracted past form of 주었어.

So:

• 보여 줘 = show / shows / is showing, depending on context
• 보여 줬어 = showed

Therefore:

• 관객이 입장권을 보여 줬어 = The audience member showed the admission ticket.

Korean often leaves out information that is clear from context.

In English, we might expect something like:

• The audience member showed the ticket to the staff.

But in Korean, if the listener already knows who received the action, that part can be omitted.

So this sentence only says:

• The audience member showed the admission ticket

If you wanted to include the person receiving the action, you could say:

• 관객이 직원에게 입장권을 보여 줬어.
• 관객이 직원한테 입장권을 보여 줬어.

Here:

• 에게
• 한테

mean to someone.

Because Korean very often omits pronouns when the context is clear.

Instead of saying:

• He showed the ticket
• She showed the ticket

Korean often just names the person once, or even leaves them out entirely if everyone already knows who is being talked about.

Here, 관객이 already tells you who did the action:

• the audience member / spectator

So there is no need for an extra pronoun.

This is very normal in Korean and can feel unusual to English speakers at first.

Yes, you could, but it changes the nuance.

• 관객이 입장권을 보여 줬어
  Focuses on the subject: the audience member is the one who showed the ticket.

• 관객은 입장권을 보여 줬어
  Makes the audience member the topic, which can sound like:

  • As for the audience member, they showed the ticket
  • or it may imply contrast: the audience member showed the ticket, but...

So both are possible, but 이/가 and 은/는 are not exactly interchangeable.

입장권 specifically means an admission ticket or entry ticket.

It is made from:

• 입장 = entrance / admission
• 권 = ticket / pass

So it is not just any kind of ticket in every context. It specifically suggests a ticket used to enter a place, such as:

• a concert
• a theater
• an event venue
• an exhibition

So it is more specific than just ticket in the broadest sense.

Yes, very different.

• 보다 = to see / to watch / to look at
• 보여 주다 = to show

Examples:

• 입장권을 봤어 = I saw/looked at the ticket.
• 입장권을 보여 줬어 = I showed the ticket.

This is an important difference:

• 보다 = the subject sees something
• 보여 주다 = the subject makes someone else see something

So in your sentence, the audience member is not looking at the ticket; they are showing it.

Yes, absolutely.

This is very natural in Korean if the situation already makes it obvious. For example, at a venue entrance, everyone would assume the audience member showed the ticket to a staff member or gate attendant.

Korean often relies on context more than English does. So a sentence can sound complete even when English would normally include more information.

That is why:

• 관객이 입장권을 보여 줬어 can sound perfectly natural on its own.