What does the Korean grammar '-더니' (-deoni) mean?

'-더니' (-deoni) is used when recalling an observed past event or state that directly led to a subsequent result, change, or contrast.

How is '-더니' used in real SBS news?

In the news clip, the reporter says '생쥐를 혼자 지내게 했더니...' meaning 'When/after they kept the mice alone, (they observed that...).'

🇰🇷 Learn Korean with News: -더니 (-deoni) | Recalling an observed past action | TOPIK Level 1-2 test

9월 16, 2026

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Learn Korean Grammar: -더니 (-deoni) |TOPIK Level 1-2 | Super Real Korean

TOPIK 1-2 Essential Grammar

Mastering Grammar '-더니'

~ 더니 [-deoni]

핵심 요약: 문법 -더니는 과거에 직접 경험하거나 관찰한 일 뒤에 새로운 결과나 변화가 나타났음을 연결할 때 사용합니다. S뉴스에서 수컷 생쥐를 혼자 지내게 했더니 음주 행동이 늘어났다는 과학적 조사 결과를 설명할 때 활용되었습니다.

Executive Summary: The grammar pattern -deoni connects a directly observed past action or state to its subsequent result or change. In this real News clip, reporters explain how male mice kept in isolation (haet-deoni) ended up consuming significantly more alcohol.

📺 Real News Video Masterclass

Watch the official SBS News broadcast to hear how native journalists use the grammar pattern "-더니" in real science reporting.

📚 TOPIK Level 1-2 Vocabulary Masterclass

Here are 5 core news words extracted directly from this SBS broadcast to strengthen your daily Korean comprehension.

1. Core Noun

외로움 [Oe-ro-um] / Loneliness

외로움을 달래기 위해 운동을 시작했어요.

I started exercising to soothe my loneliness.

2. Action Verb

관찰하다 [Gwan-chal-ha-da] / To observe

연구진이 생쥐의 음주 행동을 관찰했습니다.

The researchers observed the drinking behavior of the mice.

3. Scientific Noun

근거 [Geun-geo] / Basis, Grounds, Evidence

이 주장은 과학적 근거가 있어요.

This claim has scientific evidence.

4. Soothing Verb

달래다 [Dal-lae-da] / To soothe, To comfort

외로움은 건강한 방법으로 달래는 것이 좋아요.

It is better to soothe loneliness in a healthy way.

5. Control Verb

억제하다 [Eok-je-ha-da] / To suppress, To restrain

뇌 회로를 억제하자 알코올 섭취가 줄었어요.

When the brain circuit was suppressed, alcohol intake decreased.

✍️ Beginner Grammar Blueprints (TOPIK 1-2)

1. -더니 [Recalling an observed past action that led to a result]

생쥐를 혼자 지내게 했더니 술을 더 많이 마셨어요.

When they kept the mice alone, (they observed that) they drank more alcohol.

2. -아/어 봤더니 [Upon trying or observing something]

행동을 관찰해 봤더니 놀라운 변화가 생겼습니다.

Upon observing the behavior, an unexpected change occurred.

3. -보다(는) [Rather than, Compared to]

술보다는 운동으로 마음을 달래 보세요.

Try comforting your heart through exercise rather than alcohol.

🔗 Essential Pattern Reading: [Grammar] High-Yield Expressions for Daily Conversation 🌟

SBS News report covering research on loneliness and health habits demonstrating Korean grammar -deoni

✏️ Interactive TOPIK Level 1-2 Quiz

Q1. 연결어미 '-더니'의 올바른 의미로 가장 적절한 것은 무엇일까요? (What is the primary function of '-더니'?)

Q2. 빈칸에 들어갈 알맞은 형태를 골라보세요: "생쥐를 혼자 지내게 ( ) 음주량이 늘었습니다."

🔗 Recommended Beginner Lessons

📍 Real Story Korean: Heroic Expressions & Past Tense Retrospection 📍 Public News Korean: Emergency Health & Daily Safety Expressions Subscribe for Daily Beginner Korean Lessons

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