Contrast Conjunctions

Quick Reference

-는 반면(에): while, whereas, on the other hand (formal contrast)

• 형은 큰 반면에 동생은 작다
• A는 V는 반면(에) B는 V

-더니: and then, but then (observed change)

• 먹더니 잤어요
• V-더니 V (past observation)

Detailed Explanation

What are Contrast Conjunctions?

Contrast conjunctions connect two clauses that present opposing or contrasting information. They emphasize differences, changes, or unexpected relationships between actions or states.

-는 반면(에)

Formation

Pattern: Verb/Adjective stem + -는 반면(에)

Verb Type	Rule	Example
Action verb	Stem + -는 반면(에)	가다 → 가는 반면에
Descriptive verb (adjective)	Stem + -(으)ㄴ 반면(에)	크다 → 큰 반면에
Past tense	Stem + -던 반면(에)	가다 → 가던 반면에
Noun	Noun + 인 반면(에)	학생인 반면에

Note: 에 is often added but can be omitted without changing meaning.

Meaning and Usage

Core meaning: "while," "whereas," "on the other hand"

Usage characteristics:

1. Formal register: More formal than -지만
2. Written language: Common in essays, news, academic papers
3. Balanced contrast: Both clauses have equal weight
4. Objective tone: Presents facts without emotional judgment

When to use:

• Comparing two different subjects
• Contrasting characteristics or situations
• Academic or formal writing
• News articles and reports

Examples

Basic contrasts:

1. 형은 키가 큰 반면에 동생은 키가 작아요. (The older brother is tall, whereas the younger brother is short.)

2. 여름은 더운 반면 겨울은 추워요. (Summer is hot, while winter is cold.)

3. 한국은 산이 많은 반면에 네덜란드는 평지가 많아요. (Korea has many mountains, whereas the Netherlands has many plains.)

Contrasting behaviors:

1. 언니는 조용한 반면에 오빠는 시끄러워요. (The older sister is quiet, while the older brother is loud.)

2. 그는 말은 적은 반면 행동은 많아요. (He speaks little, whereas he acts much.)

3. 아버지는 엄격한 반면에 어머니는 온화하세요. (Father is strict, while mother is gentle.)

Social/economic contrasts:

1. 도시는 발전하는 반면 농촌은 쇠퇴하고 있다. (Cities are developing, while rural areas are declining.)

2. 부자는 더 부유해지는 반면 가난한 사람들은 더 가난해진다. (The rich are getting richer, while poor people are getting poorer.)

3. 경제는 성장하는 반면에 환경은 악화되고 있어요. (The economy is growing, whereas the environment is deteriorating.)

Academic/formal contexts:

1. 이 이론은 설명력이 높은 반면 실용성이 떨어진다. (This theory has high explanatory power, while it lacks practicality.)

2. 전통적 방법은 안정적인 반면 새로운 방법은 효율적이다. (Traditional methods are stable, whereas new methods are efficient.)

3. 한국어는 배우기 쉬운 반면에 한자는 어렵다. (Korean is easy to learn, while Chinese characters are difficult.)

-더니

Formation

Pattern: Verb/Adjective stem + -더니

Important: No variation - always -더니 regardless of final consonant.

Type	Formation	Example
Action verb	Stem + -더니	가다 → 가더니
Descriptive verb	Stem + -더니	좋다 → 좋더니
있다/없다	있더니, 없더니	있다 → 있더니

Meaning and Usage

Core meanings:

1. Sequential observation: "and then" (observed one action, then another)
2. Contrasting observation: "but then" (situation changed unexpectedly)
3. Cause-effect observation: First action led to second

Key characteristics:

• Personal observation: Speaker witnessed both events
• Past tense: Always refers to past observations
• Informal tone: Common in casual speech
• Surprise or notation: Often implies unexpected result

When to use:

• Describing what you observed
• Noting changes or sequences
• Casual conversation
• Personal narratives

Examples

Sequential actions (and then):

1. 밥을 먹더니 잤어요. (They ate and then slept / After eating, they slept.)

2. 학교에 가더니 친구를 만났어요. (They went to school and then met a friend.)

3. 책을 읽더니 울기 시작했어요. (They were reading, and then started crying.)

4. 전화하더니 바로 나갔어요. (They made a call and then went out immediately.)

Contrasting observations (but then):

1. 어제는 아프더니 오늘은 괜찮아요. (Yesterday they were sick, but today they're fine.)

2. 아까는 화가 났더니 지금은 웃네요. (Earlier they were angry, but now they're laughing.)

3. 처음에는 싫다고 하더니 나중에는 좋아했어요. (At first they said they didn't like it, but later they liked it.)

4. 비가 오더니 이제 개었어요. (It was raining, but now it has cleared up.)

Cause and effect:

1. 열심히 공부하더니 시험을 잘 봤어요. (They studied hard, and (as a result) did well on the exam.)

2. 운동을 많이 하더니 건강해졌어요. (They exercised a lot, and became healthy.)

3. 술을 많이 마시더니 다음 날 아팠어요. (They drank a lot, and the next day they were sick.)

4. 돈을 모으더니 차를 샀어요. (They saved money, and then bought a car.)

Noting changes:

1. 아이가 자라더니 이제 어른이 됐어요. (The child grew up, and now has become an adult.)

2. 날씨가 추워지더니 눈이 왔어요. (The weather got cold, and then it snowed.)

-더니 vs. -았/었더니

-더니 (direct observation): - 비가 오더니 그쳤어요. (It was raining, and then it stopped.)

-았/었더니 (past action with result): - 밖에 나갔더니 비가 왔어요. (I went outside, and it was raining.)

Comparing -는 반면(에) vs. -더니

Aspect	-는 반면(에)	-더니
Formality	Formal	Casual
Usage	Written, formal speech	Spoken, casual
Tense	Any tense	Past only
Contrast type	Balanced, objective	Sequential, subjective
Observation	General fact	Personal witness

Example comparison:

1. Formal contrast (-는 반면에):

2. 형은 공부를 잘하는 반면에 동생은 운동을 잘해요. (The older brother is good at studying, whereas the younger is good at sports.)

3. Observed sequence (-더니):

4. 형은 공부하더니 동생은 운동하러 갔어요. (The older brother was studying, and then the younger went to exercise.)

Practice

Choose the correct conjunction (-는 반면에 or -더니):

1. 한국어는 쉬운 _ 한자는 어렵다. (academic writing)

2. 아침에는 피곤하_ 지금은 괜찮아요. (personal observation)

3. 도시는 발전하_ 농촌은 낙후되고 있다. (news article)

4. 비가 오_ 바람도 불었어요. (what you saw)

5. 이 방법은 빠른 _ 저 방법은 안전하다. (comparison)

Translate to Korean using the appropriate conjunction:

1. My older sister is quiet, whereas my younger brother is loud.

2. They were sick yesterday, but today they're fine.

3. The economy is growing, while the environment is deteriorating.

4. They ate and then went to sleep.

5. Summer is hot, while winter is cold. (formal writing)

Show Answers

1. 반면에 2. 더니 3. 는 반면에 4. 더니 5. 반면에 6. 언니는 조용한 반면에 남동생은 시끄러워요. 7. 어제는 아프더니 오늘은 괜찮아요. 8. 경제는 성장하는 반면에 환경은 악화되고 있어요. 9. 먹더니 잤어요. / 밥을 먹더니 자러 갔어요. 10. 여름은 더운 반면 겨울은 춥다. / 여름은 더운 반면에 겨울은 추워요.