At the A1 level, '구성되다' might feel a bit difficult because it is a formal word. However, you can think of it as a fancy way to say 'is made of' or 'has'. For example, if you want to say 'My family has four people', you could use this word to sound more grown-up. You will mostly see it in very simple sentences like 'The team is 5 people'. The most important thing to remember at this level is the small word '로' or '으로' that comes before it. It's like the word 'of' in 'composed of'. Don't worry about using it in daily talk yet; just try to recognize it when you see it in a book or a simple news headline for kids. It helps you describe groups of things clearly.
At the A2 level, you are starting to describe things in more detail. '구성되다' is useful when you talk about your school, your family, or a simple hobby group. Instead of just saying 'There are 10 students in my class', you can say 'My class is composed of 10 students'. This makes your Korean sound more organized. You should practice the pattern: [Group] + 은/는 + [Number/Parts] + (으)로 구성되어 있어요. This 'state' form (~어 있어요) is very common at this level. You might also see this word on food packaging or in simple instructions. It’s a great 'bridge' word that helps you move from basic sentences to more structured descriptions of the world around you.
As a B1 learner, '구성되다' is a key vocabulary item for your professional and academic growth. You are expected to use this word in formal writing and presentations. It is the standard way to describe the structure of an organization, the parts of a machine, or the sections of a report. At this level, you should understand the difference between '구성되다' (passive) and '구성하다' (active). You should also be comfortable using it in the past tense ('구성되었다') to talk about how a committee or a team was formed. This word adds a layer of precision to your speech, allowing you to move away from general verbs like '있다' and '하다' toward more specific, high-level vocabulary.
At the B2 level, you should be able to use '구성되다' fluently in complex sentences. You will encounter it frequently in news articles, documentaries, and intermediate-level textbooks. You should pay attention to how it is used with abstract concepts, such as 'The curriculum is composed of various subjects' or 'The atmosphere is composed of gases'. You should also be able to use the adjective form '구성된' to modify nouns, like 'a team composed of experts'. At this level, you are expected to know that '구성되다' is more formal than '이루어지다' and choose between them based on the context. Your ability to use this word correctly in a TOPIK II writing task will help you achieve a higher score.
For C1 learners, '구성되다' is a versatile tool for high-level discourse. You should be able to use it to discuss complex social structures, scientific theories, and philosophical frameworks. You will notice its use in legal documents and academic journals where precision is paramount. At this level, you should also be aware of its collocations, such as '다각도로 구성되다' (to be composed of various angles/perspectives) or '유기적으로 구성되다' (to be organically composed). You should be able to critique the structure of a text or a system using this word. Your understanding of '구성되다' should include its nuance of 'structural integrity'—the idea that the parts listed are essential and sufficient for the whole to exist.
At the C2 level, '구성되다' is part of your instinctive vocabulary. You use it effortlessly in scholarly writing, high-level business negotiations, and literary analysis. You understand the subtle stylistic differences between '구성되다', '체계화되다', '조직되다', and '이루어지다', and you use them to create specific rhetorical effects. You might use '구성되다' to describe the intricate architecture of a symphony or the complex layers of a legal precedent. At this level, you are not just using the word; you are manipulating it to provide clarity and authority to your arguments. You can also recognize when a writer uses the word ironically or metaphorically to describe human relationships or chaotic situations.

구성되다 30초 만에

  • Meaning: To be composed of or consist of.
  • Grammar: Usually paired with the particle ~로/으로.
  • Register: Formal, academic, and professional contexts.
  • Common Usage: Describing teams, chemical makeup, or book structures.

The Korean verb 구성되다 (guseong-doeda) is a fundamental term used to describe the internal structure, makeup, or organization of an entity. At its core, it is the passive form of 구성하다 (to compose/organize). When we use 구성되다, the focus is on the resulting state of being 'composed of' or 'consisting of' specific elements, rather than the act of putting them together. This word is indispensable in academic, professional, and formal contexts where precision regarding the parts of a whole is required.

Etymology
Derived from the Hanja 構成 (구 - to plot/construct, 성 - to accomplish) combined with the auxiliary verb 되다 (to become/be done).
Grammatical Category
Intransitive Verb (Passive construction), often paired with the particle ~로/으로.

In a conceptual sense, 구성되다 implies a logical or physical arrangement. For instance, a committee is not just a group of people; it is 'composed' of members with specific roles. A molecule is not just a bunch of atoms; it is 'composed' of specific chemical elements in a fixed ratio. The word carries a sense of completeness and structural integrity. It answers the question: 'What are the building blocks of this thing?'

우리 팀은 전문가 5명으로 구성되어 있습니다.

— Translation: Our team is composed of five experts.

Furthermore, 구성되다 is often used to describe abstract concepts. A story is composed of a beginning, middle, and end. A political system is composed of various branches of government. In these cases, the word helps the listener visualize the 'skeleton' or 'framework' of the subject. It is less about the physical assembly and more about the systemic relationship between the parts.

이 책은 총 10개의 장으로 구성된다.

— Translation: This book consists of a total of 10 chapters.

In everyday conversation, you might not use 구성되다 as frequently as '있다' (to have/be) or '들어있다' (to be inside), but as you move into intermediate (B1) and advanced (C1) Korean, this word becomes a key tool for summarizing complex information. It allows you to categorize and list components efficiently. For example, in a business presentation, saying 'Our service is composed of three main features' sounds significantly more authoritative than simply saying 'Our service has three features.'

물은 수소와 산소로 구성된다.

— Translation: Water is composed of hydrogen and oxygen.
Semantic Range
Physical makeup, organizational structure, conceptual frameworks, chemical composition, literary structure.

Lastly, it's important to note that 구성되다 is almost always used in the present tense or the present progressive form (구성되어 있다) to describe a current state. If you use it in the past tense (구성되었다), it usually implies the moment the composition was finalized or established. Understanding this temporal nuance is crucial for natural-sounding Korean.

위원회는 작년에 구성되었다.

— Translation: The committee was formed (composed) last year.

대기는 질소와 산소 등으로 구성되어 있다.

— Translation: The atmosphere is composed of nitrogen, oxygen, and so on.
Visual Metaphor
Imagine a LEGO set. The finished castle is '구성되다' (composed) of various bricks, plates, and figures. Each piece is essential to the final '구성' (composition).

Using 구성되다 correctly requires an understanding of both its grammatical particles and its situational appropriateness. Unlike simple verbs, this word often functions as a 'stative' verb in practice, describing the condition of an object. Here is a detailed breakdown of how to integrate it into your Korean speech and writing.

1. The Essential Particle: ~로/으로

The most critical rule when using 구성되다 is its pairing with the particle ~로 (after a vowel) or ~으로 (after a consonant). This particle indicates the material or components that make up the whole. Without it, the sentence will feel incomplete or grammatically incorrect.

  • Consonant ending: 가족 + 으로 → 가족으로 구성되다 (Composed of family)
  • Vowel ending: 멤버 + 로 → 멤버로 구성되다 (Composed of members)

이 세트는 3가지 제품으로 구성되어 있습니다.

— Translation: This set is composed of three products.

2. State vs. Action

While 구성되다 is a verb, it is frequently used in the -어 있다 form (구성되어 있다) to describe a persistent state. If you say 구성된다, it sounds like a general fact or a scientific definition. If you say 구성되어 있다, it sounds like you are describing a specific entity in front of you.

General Fact
인간의 몸은 대부분 물로 구성된다. (The human body is mostly composed of water.)
Specific Description
이 동아리는 학생들로 구성되어 있다. (This club is composed of students.)

3. Formal vs. Informal Register

구성되다 is inherently a formal word. In casual settings (Banmal), Koreans might use simpler phrases like '~로 되어 있어' or '~가 들어 있어'. However, in writing, news reporting, or business meetings, 구성되다 is the standard choice. Using it correctly in these settings will significantly boost your perceived proficiency.

4. Common Patterns

To master this word, memorize these common sentence patterns:

  • [Whole] + 은/는 + [Parts] + (으)로 구성되다: The whole consists of parts.
  • [Parts] + (으)로 구성된 + [Whole]: A whole composed of parts (Adjective form).
  • [Whole] + 이/가 + 어떻게 구성되어 있나요?: How is [Whole] composed?

전문가들로 구성된 위원회가 사건을 조사 중입니다.

— Translation: A committee composed of experts is investigating the case.

5. Nuance of 'Elements'

When using 구성되다, the elements listed are usually considered the essential parts. If you leave one out, the definition of the 'whole' might change. This is why it is used for ingredients in a recipe (sometimes), parts of a machine, or members of a group. It implies a sense of structural completeness.

Incorrect Usage
Avoid using it for temporary mixtures. For example, 'The soup is composed of salt' is weird. Better: 'The soup is seasoned with salt'. Use 구성되다 for the core ingredients like 'The soup is composed of broth, vegetables, and meat'.

You will encounter 구성되다 in a variety of professional and informative settings. Because it deals with structure and organization, it is a staple of 'explanatory' Korean. Here are the most common environments where this word is used.

1. Academic and Scientific Contexts

In textbooks, lectures, and research papers, 구성되다 is used to describe the makeup of matter, biological organisms, or social systems. If you are studying for the TOPIK exam or attending a Korean university, you will see this word daily.

세포는 핵과 세포질 등으로 구성됩니다.

— Context: Biology Textbook

2. News and Media

News anchors use this word when reporting on the formation of new government cabinets, the structure of a legal team, or the breakdown of a budget. It provides a sense of clarity and objectivity to the report.

이번 조사단은 총 20명의 인력으로 구성되었습니다.

— Context: News Report

3. Business and Corporate Environments

In the workplace, 구성되다 is used during presentations to explain team structures, project components, or product packages. It sounds much more professional than using 'have' (있다).

4. Product Descriptions and Manuals

When you buy a product in Korea, the 'Package Contents' section of the manual will often use this word. It lists everything included in the box to ensure the customer knows what they are receiving.

본 제품은 본체, 충전기, 설명서로 구성되어 있습니다.

— Context: Product Manual

5. Legal and Official Documents

Contracts and laws use 구성되다 to define the scope of a legal entity or the parts of a specific regulation. It is a 'heavy' word that carries legal weight.

Legal Example
이 위원회는 위원장 1명을 포함한 10명의 위원으로 구성된다. (This committee consists of 10 members including one chairperson.)

In summary, if the situation involves explaining what something is made of in an organized, clear, or formal way, 구성되다 is the word you will hear. It bridges the gap between simple 'having' and complex 'structural composition'.

Even intermediate learners often stumble when using 구성되다. Because it has a specific grammatical requirement and a passive nuance, it’s easy to make mistakes that sound unnatural to native speakers. Here are the most common pitfalls to avoid.

1. Using the Wrong Particle

The most frequent error is using the subject particle (이/가) or the object particle (을/를) instead of the instrumental particle (로/으로). Remember, 구성되다 is passive; the components are the 'means' by which the whole is formed.

❌ Incorrect
팀이 학생들을 구성되다. (The team is composed students - Nonsensical)
✅ Correct
팀이 학생들 구성되다. (The team is composed of students.)

2. Confusing '구성되다' with '구성하다'

구성하다 is active (to compose/to form), while 구성되다 is passive (to be composed). Learners often mix these up when they want to say 'The team is made of...'.

  • Active: 감독이 팀을 구성했다. (The coach formed the team.)
  • Passive: 팀은 선수들로 구성되었다. (The team was composed of players.)

3. Overusing it in Casual Conversation

While not grammatically 'wrong', using 구성되다 when talking about your lunch or your backpack with friends can sound overly stiff or robotic. It's like saying 'My lunch is composed of a sandwich and an apple' instead of 'I have a sandwich and an apple for lunch'.

내 가방은 책이랑 펜으로 구성되어 있어. (Sounds like a robot)

— Better: 내 가방에 책이랑 펜이 들어 있어.

4. Forgetting the 'State' Marker (~어 있다)

When describing a group that already exists, using the simple present 구성된다 can sound like a definition from a dictionary. To describe a specific group in real-time, 구성되어 있다 is much more natural.

Dictionary Style
가족은 부모와 자녀로 구성된다. (Generic definition)
Natural Description
우리 가족은 네 명으로 구성되어 있어요. (Describing your own family)

5. Redundancy with '모두' (All)

Since 구성되다 already implies the total makeup of something, adding '모두' (all) can sometimes be redundant, though it is often used for emphasis. Be careful not to clutter the sentence.

Korean has several words that translate to 'to consist of' or 'to be made of'. Understanding the subtle differences between 구성되다 and its synonyms will help you choose the right word for every context.

1. 이루어지다 vs. 구성되다

이루어지다 is the most common synonym. It is broader and can be used for both physical composition and the realization of a goal or dream. 구성되다 is more focused on the 'structure' and 'parts'.

  • 구성되다: Emphasis on the organization of parts (Formal/Technical).
  • 이루어지다: Emphasis on the result of parts coming together (General/Natural).

꿈이 이루어지다. (A dream comes true - You CANNOT use 구성되다 here.)

2. 형성되다 vs. 구성되다

형성되다 (to be formed) focuses on the process of taking shape over time. 구성되다 focuses on the static structure of the parts.

형성되다
여론이 형성되다 (Public opinion is formed over time).
구성되다
위원회가 구성되다 (A committee is organized with specific members).

3. 짜이다 vs. 구성되다

짜이다 is often used for schedules, plans, or woven materials. It implies a 'knit' or 'tight' arrangement. 구성되다 is more general for any type of composition.

일정이 빡빡하게 짜여 있다. (The schedule is tightly packed.)

4. 조직되다 vs. 구성되다

조직되다 (to be organized) is specifically used for human groups, like labor unions, secret societies, or military units. 구성되다 can be used for humans, but also for inanimate objects and abstract ideas.

조직되다
노동조합이 조직되었다. (A labor union was organized.)
구성되다
분자는 원자로 구성된다. (Molecules are composed of atoms.)

By mastering these distinctions, you can move beyond basic vocabulary and express yourself with the nuance of a native speaker. 구성되다 remains the 'gold standard' for describing formal composition.

How Formal Is It?

난이도

알아야 할 문법

~로/으로 (Instrumental particle)

~어 있다 (State of being)

~ㄴ다/는다 (Plain form)

~며 (Connective for listing)

수준별 예문

1

우리 가족은 네 명으로 구성됩니다.

My family is composed of four people.

명 (counter for people) + 으로 (particle)

2

이 팀은 학생들로 구성되어 있어요.

This team is composed of students.

들 (plural) + 로 (particle)

3

사과는 빨간색과 초록색으로 구성됩니다.

Apples are composed of red and green colors.

과 (and) + 로 (particle)

4

이 책은 세 부분으로 구성돼요.

This book is composed of three parts.

돼요 (contraction of 되어요)

5

교실은 책상과 의자로 구성됩니다.

The classroom is composed of desks and chairs.

와 (and) + 로 (particle)

6

일주일은 7일로 구성되어 있습니다.

A week is composed of 7 days.

일 (day) + 로 (particle)

7

이 선물은 과일로 구성됩니다.

This gift is composed of fruit.

로 (particle)

8

노래는 가사와 멜로디로 구성돼요.

A song is composed of lyrics and melody.

와 (and) + 로 (particle)

1

동아리는 10명의 회원으로 구성되어 있습니다.

The club is composed of 10 members.

회원 (member) + 으로 (particle)

2

이 세트 메뉴는 햄버거와 콜라로 구성됩니다.

This set menu consists of a burger and a cola.

와 (and) + 로 (particle)

3

시험은 듣기와 읽기로 구성되어 있어요.

The exam consists of listening and reading.

기 (nominalizer) + 로 (particle)

4

우리 마을은 작은 집들로 구성되어 있습니다.

Our village is composed of small houses.

들 (plural) + 로 (particle)

5

영화는 여러 장면으로 구성됩니다.

A movie is composed of many scenes.

장면 (scene) + 으로 (particle)

6

이 요리는 고기와 채소로 구성되어 있어요.

This dish is composed of meat and vegetables.

와 (and) + 로 (particle)

7

컴퓨터는 모니터와 본체로 구성됩니다.

A computer consists of a monitor and a main body.

와 (and) + 로 (particle)

8

축구 팀은 11명의 선수로 구성되어 있습니다.

A soccer team is composed of 11 players.

명 (counter) + 로 (particle)

1

정부는 입법, 사법, 행정의 세 부문으로 구성된다.

The government is composed of three branches: legislative, judicial, and executive.

Formal written style (~ㄴ다)

2

이 보고서는 서론, 본론, 결론으로 구성되어 있습니다.

This report is composed of an introduction, body, and conclusion.

Standard formal style (~습니다)

3

위원회는 전문가 5명과 시민 2명으로 구성되었습니다.

The committee was composed of 5 experts and 2 citizens.

Past tense (~었습니다)

4

물 분자는 수소 원자 두 개와 산소 원자 한 개로 구성된다.

A water molecule is composed of two hydrogen atoms and one oxygen atom.

Scientific fact style

5

이 프로그램은 총 4개의 모듈로 구성되어 있습니다.

This program consists of a total of 4 modules.

Business context

6

대기는 주로 질소와 산소로 구성되어 있다.

The atmosphere is mainly composed of nitrogen and oxygen.

State of being (~어 있다)

7

우리 회사는 마케팅팀과 개발팀으로 구성됩니다.

Our company is composed of a marketing team and a development team.

Organizational structure

8

이 소설은 액자식 구조로 구성되어 있어 독특하다.

This novel is unique because it is composed in a frame structure.

Literary analysis

1

태양계는 태양과 그 주위를 도는 행성들로 구성된다.

The solar system is composed of the sun and the planets that orbit it.

Scientific definition

2

단백질은 수많은 아미노산의 결합으로 구성되어 있다.

Proteins are composed of combinations of numerous amino acids.

Complex noun phrase + 으로

3

국회는 국민의 투표로 선출된 의원들로 구성됩니다.

The National Assembly is composed of members elected by the people's vote.

Passive modifier (선출된)

4

이 합금은 구리와 아연으로 구성되어 내구성이 강하다.

This alloy is composed of copper and zinc, making it highly durable.

Cause and effect (~어/아서)

5

교과 과정은 이론 강의와 실습으로 구성되어 있습니다.

The curriculum is composed of theoretical lectures and practical training.

Educational context

6

인간의 뇌는 수천억 개의 신경세포로 구성되어 있다.

The human brain is composed of hundreds of billions of neurons.

Large numbers + counter

7

이 영화제는 경쟁 부문과 비경쟁 부문으로 구성됩니다.

This film festival consists of competitive and non-competitive sections.

Categorization

8

도시의 인구는 다양한 연령층으로 구성되어 있다.

The city's population is composed of various age groups.

Sociological description

1

헌법 재판소는 9명의 재판관으로 구성되며, 임기는 6년이다.

The Constitutional Court is composed of nine justices, and their term is six years.

Legal text style (~며 connective)

2

이 이론은 세 가지 핵심 가설로 구성되어 논리적 타당성을 갖춘다.

This theory is composed of three core hypotheses, providing logical validity.

Academic discourse

3

생태계는 생물적 요소와 비생물적 요소의 상호작용으로 구성된다.

An ecosystem is composed of the interaction between biotic and abiotic elements.

Abstract interaction as a component

4

현대 사회는 복잡한 네트워크와 정보의 흐름으로 구성되어 있다.

Modern society is composed of complex networks and the flow of information.

Metaphorical composition

5

작품의 서사는 과거와 현재가 교차하는 방식으로 구성되었다.

The narrative of the work was composed in a way where past and present intersect.

Narrative structure

6

지구의 내부는 지각, 맨틀, 외핵, 내핵으로 구성되어 있다.

The Earth's interior is composed of the crust, mantle, outer core, and inner core.

Geological terms

7

그의 철학은 인본주의와 실존주의의 결합으로 구성된다.

His philosophy is composed of a combination of humanism and existentialism.

Philosophical composition

8

이 오케스트라는 현악기, 관악기, 타악기 파트로 구성되어 있다.

This orchestra is composed of string, wind, and percussion sections.

Musical terminology

1

우주는 암흑 물질과 암흑 에너지가 지배적인 비중으로 구성되어 있다는 가설이 유력하다.

The hypothesis that the universe is composed of a dominant proportion of dark matter and dark energy is prevailing.

Complex embedded clause

2

법인격은 권리와 의무의 주체가 될 수 있는 법적 자격으로 구성된다.

Legal personality is composed of the legal qualification to be a subject of rights and obligations.

Jurisprudential definition

3

이 시의 운율은 음보의 규칙적인 반복과 변주로 구성되어 미적 쾌감을 준다.

The rhythm of this poem is composed of regular repetitions and variations of feet, providing aesthetic pleasure.

Literary criticism

4

다국적 기업의 전략은 현지화와 표준화의 절묘한 균형으로 구성되어야 한다.

The strategy of a multinational corporation must be composed of an exquisite balance between localization and standardization.

Prescriptive formal tone (~어야 한다)

5

인간의 의식은 무의식적 욕망과 사회적 억압의 갈등으로 구성된다는 견해가 있다.

There is a view that human consciousness is composed of the conflict between unconscious desires and social suppression.

Psychological discourse

6

고대 그리스 비극은 코러스의 노래와 배우의 대사가 유기적으로 구성된 형태였다.

Ancient Greek tragedy was a form in which the chorus's songs and the actors' lines were organically composed.

Historical analysis

7

양자 역학의 세계는 확률과 불확정성의 원리로 구성되어 우리의 직관을 거스른다.

The world of quantum mechanics is composed of the principles of probability and uncertainty, defying our intuition.

Scientific philosophy

8

국가 권력은 견제와 균형의 원리에 따라 분립되어 구성되어야 민주주의가 유지된다.

State power must be separated and composed according to the principle of checks and balances for democracy to be maintained.

Political theory

동의어

이루어지다 조직되다 형성되다

반의어

해체되다 분해되다

자주 쓰는 조합

팀으로 구성되다 (to be composed of a team)
요소로 구성되다 (to be composed of elements)
멤버로 구성되다 (to be composed of members)
부분으로 구성되다 (to be composed of parts)
원자로 구성되다 (to be composed of atoms)
위원으로 구성되다 (to be composed of members/commissioners)
내용으로 구성되다 (to be composed of content)
단계로 구성되다 (to be composed of stages)
유기적으로 구성되다 (to be organically composed)
다양하게 구성되다 (to be diversely composed)

자주 혼동되는 단어

구성되다 vs 구성하다 (Active form: to compose)

구성되다 vs 이루어지다 (More general: to consist of)

구성되다 vs 만들어지다 (To be made - more physical/manual)

혼동하기 쉬운

구성되다 vs

구성되다 vs

구성되다 vs

구성되다 vs

구성되다 vs

문장 패턴

사용법

social

Used to describe the demographics of a population.

technical

Common in STEM fields for describing mixtures and compounds.

자주 하는 실수
  • Using 을/를 instead of 로/으로.
  • Using it for simple, non-structural things (like a pile of trash).
  • Confusing it with the active '구성하다'.
  • Using it for 'dreams coming true' (that's 이루어지다).
  • Forgetting the '으로' after a consonant (e.g., 가족로 instead of 가족으로).

Particle Check

Always double-check if you used '로' or '으로' correctly based on the final consonant.

Be Formal

Use this word in interviews to describe your previous project teams; it sounds very professional.

Synonym Choice

If you are talking about a dream coming true, never use '구성되다'; use '이루어지다' instead.

Academic Tone

When writing a thesis, use '구성되다' to describe your research framework.

News Keywords

When you hear '구성', get ready to hear a list of names or parts.

State vs Action

Use '구성되어 있다' to describe something that is already built.

Textbook Clue

In science books, this word usually introduces the chemical formula or biological parts.

Structure

Think of the 'S' in '구성' as standing for 'Structure'.

No Object

Since it's passive, don't use '을/를' before '구성되다'.

Completeness

Using this word implies that the parts you listed make up the whole thing entirely.

암기하기

어원

Sino-Korean word meaning to construct or build up a structure.

문화적 맥락

Essential for students writing essays or research papers in Korean universities.

Using this word in business meetings makes you sound professional and respectful of the company's hierarchy.

실생활에서 연습하기

실제 사용 상황

대화 시작하기

"이 팀은 어떻게 구성되어 있나요?"

"가족이 몇 명으로 구성되어 있어요?"

"이 요리는 어떤 재료로 구성되나요?"

"새로운 프로젝트 팀은 누구로 구성되었나요?"

"이 책은 몇 개의 장으로 구성되어 있습니까?"

일기 주제

나의 완벽한 하루는 어떤 활동들로 구성될까?

우리 가족의 구성원에 대해 써 보세요.

내가 가장 좋아하는 영화의 구성을 설명해 보세요.

성공적인 삶은 무엇으로 구성된다고 생각하나요?

한국어 공부 계획은 어떻게 구성되어 있나요?

자주 묻는 질문

10 질문

Yes, but only in formal contexts like a menu description or a nutritional analysis. In casual talk, use '들어 있다'.

구성되다 is more formal and focuses on the structure/parts. 이루어지다 is more general and can also mean 'to be realized'.

Yes, almost 99% of the time, the components are marked with '로' or '으로'.

Yes, it is very common to describe the members of a team or committee.

Yes, it is the passive counterpart of '구성하다'.

5명으로 구성된 팀.

Yes, '구성되었다' means 'was composed' or 'was formed'.

Yes, it is a very common word in TOPIK II reading and writing sections.

You use '와/과' to connect the parts, but the final part must have '로/으로'.

In some contexts, yes, but specifically in terms of who or what makes up the organization.

셀프 테스트 180 질문

/ 180 correct

Perfect score!

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