amachueo geukdaneun hwayoire yeonseupsireseo mannasseo.

-은/는 is the topic marker. It marks 아마추어 극단 as the thing the sentence is about.

So 아마추어 극단은 means something like:

• as for the amateur theater group
• the amateur theater group, ...

In this sentence, it sets up the group as the topic, and then the rest of the sentence tells you what happened to that topic.

A learner might compare it to -이/가, which is a subject marker. Very roughly:

• 극단은 = as for the theater group
• 극단이 = the theater group (with more focus on it as the subject)

Both can be possible in some contexts, but -은 here sounds natural if you are talking about that group and giving information about what it did.

-에 is often used with time expressions to mean at/on/in.

So:

• 화요일 = Tuesday
• 화요일에 = on Tuesday

This particle is very common with days, dates, and clock times.

Examples:

• 월요일에 = on Monday
• 세 시에 = at three o’clock
• 여름에 = in summer

Also, in everyday Korean, -에 is sometimes omitted with certain time words, but with 화요일, keeping -에 is completely standard and clear.

This is a very common question.

• -에 often marks a destination or a location of existence
• -에서 marks the place where an action happens

Here, 만났어 is an action: meeting. So the place where that action happened takes -에서.

• 연습실에서 만났어 = met in the practice room

Compare:

• 연습실에 갔어 = went to the practice room
• 연습실에 있어 = am in the practice room
• 연습실에서 연습했어 = practiced in the practice room

So in this sentence, -에서 is correct because it marks the location where the meeting took place.

만났어 is the casual past tense form of 만나다 (to meet).

Breakdown:

• 만나다 = dictionary form, to meet
• stem: 만나-
• past marker: -았/었-
• casual ending: -어

This becomes:

• 만나 + 았어
• contracted to 만났어

So 만났어 means met in a casual, informal style.

Related forms:

• 만나요 = meet / will meet / am meeting (polite)
• 만났어요 = met (polite)
• 만났습니다 = met (formal)

Because Korean normally uses Subject-Object-Verb or, more generally, puts the verb at the end.

English:

• The amateur theater group met in the practice room on Tuesday.

Korean:

• 아마추어 극단은 화요일에 연습실에서 만났어.

Even though Korean word order is more flexible than English because of particles, the main verb usually comes last.

That is one of the biggest structural differences English speakers need to get used to.

Yes. Korean word order is fairly flexible, especially with time and place expressions, because particles show each word’s role.

So these are both possible:

• 아마추어 극단은 화요일에 연습실에서 만났어.
• 아마추어 극단은 연습실에서 화요일에 만났어.

Both are grammatical.

However, the first version often feels more natural because Korean frequently follows a time → place → action order:

• when
• where
• what happened

So 화요일에 연습실에서 만났어 is a very typical arrangement.

만나다 often means to meet someone, so yes, it can take an object.

Example:

• 친구를 만났어 = I met a friend

But in some contexts, especially with groups, it can also mean to meet up or gather, where the person or people being met are understood from context.

In this sentence, 아마추어 극단은 ... 만났어 sounds like:

• the amateur theater group met up
• the amateur theater group got together

So even without an object like 누구를, the sentence is natural.

Because Korean often does not mark plurals unless it is necessary or helpful.

Also, 극단 here refers to a group or troupe, which is already a collective noun. So adding -들 would usually be unnecessary.

• 극단 = a theater troupe / company / group

Even though it contains multiple people, Korean does not need to show that with extra plural marking.

This is different from English, where learners may expect every plural idea to be marked more clearly.

It is written as two words:

• 아마추어 = amateur
• 극단 = theater troupe / dramatic company

Together, they form a noun phrase meaning amateur theater group or amateur theater troupe.

In Korean, many modifier + noun combinations are written as separate words, so it is normal that 아마추어 극단 is not one single block.

만났어 is in the casual/informal speech level.

It is used with:

• close friends
• younger people
• family members
• situations where casual speech is appropriate

If you want to make the sentence polite, you would say:

• 아마추어 극단은 화요일에 연습실에서 만났어요.

If you want an even more formal style:

• 아마추어 극단은 화요일에 연습실에서 만났습니다.

So the original sentence sounds friendly and informal.

The particle is written as -은 here because 극단 ends in a consonant.

Rule:

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

Since 극단 ends in ㄴ, you use 극단은.

Examples:

• 학생은 = as for the student
• 의자는 = as for the chair

So this is just the normal phonological rule for the topic particle.

Yes, there can be a nuance difference.

• 만났어 = met / met up
• 모였어 = gathered / assembled

With a group as the subject, 만났어 suggests the members came together and met.
모였어 puts a bit more emphasis on the idea of physically gathering in one place.

So:

• 연습실에서 만났어 = met up in the practice room
• 연습실에서 모였어 = gathered in the practice room

Both can work depending on context, but 만났어 sounds very natural if the focus is on the group meeting.

In casual spoken Korean, some particles are sometimes omitted, but in a clear textbook-style sentence like this, keeping them is best.

For example:

• 화요일에 keeps the time relation clear
• 연습실에서 clearly shows the location of the action
• 극단은 clearly marks the topic

If you drop too many particles, the sentence can become harder for learners to parse. So this version is a good, standard, natural sentence to study.

A useful way is to read it in chunks:

• 아마추어 극단은 = as for the amateur theater group
• 화요일에 = on Tuesday
• 연습실에서 = in the practice room
• 만났어 = met

So the sentence follows a very common Korean pattern:

Topic + Time + Place + Verb

That pattern shows up constantly in beginner and intermediate Korean, so this sentence is a good example to learn from.