🇰🇷 Lesson 6: Reasons & Causes

You're twenty minutes late for work. Your team leader looks up. In English you have one word to start your explanation: because. Everything else (whose fault it was, whether it was bad luck, whether you were simply busy) has to be added with extra words.

Korean builds that attitude into the connector itself. "I overslept, and wham, I was late" (-는 바람에). "I was busy finishing the report, so I couldn't…" (-느라고). "Thanks to you…" (덕분에). "It's the weather's fault…" (탓에). "Seeing that it was on sale, I bought two" (-길래). At A2 you learned -아서 and -(으)니까, the neutral workhorses. This lesson gives you the specialist tools, and with them the grammar of excuses, explanations, gratitude and blame.

🧠 The Mental Model: What Kind of Story Is Your Reason?

Every reason connector answers two questions. What kind of cause was it? (a busy activity, a sudden accident, someone's help, someone's fault, something you noticed). What can come after it? (a command? a past result only? only your own action?). Get those two right and the rest is conjugation.

🏛️ -기 때문에 and N 때문에: The Emphatic "Because"

때문 means "reason" or "cause". -기 때문에 puts the reason in the spotlight, which makes it the natural choice in explanations, presentations and essays. Unlike -아서, it happily takes the past tense.

⏳ -느라고: "I Was Busy Doing…"

-느라고 (often shortened to -느라) says: my time and energy went into X, so Y suffered. It is the king of polite excuses, because it frames the problem as being busy with something, not as laziness.

One lovely exception to "negative": the set phrases of thanks for someone's effort. 오시느라 고생 많으셨어요. ("Thank you for coming all this way.") 준비하느라 수고하셨습니다. ("Thank you for all your work preparing this.") The result (hardship) is still effortful, but the sentence is a warm acknowledgement.

🌪️ -는 바람에: "And Then, Out of Nowhere…"

바람 is literally "wind". -는 바람에 describes a cause that blew in suddenly: an accident, a surprise, something you didn't plan. The result is almost always unwelcome and already happened.

Unlike -느라고, the two clauses can have different subjects (옆 사람이 미는 바람에 제가 쏟았어요). Like -느라고, it takes no tense itself and cannot be followed by a command or suggestion. Adjectives don't take it.

🙏 덕분에 and 😤 탓에: Credit and Blame

These two are mirror images. 덕분 is "benefit, favour"; 탓 is "fault, blame". Both attach to nouns directly and to verbs through a modifier.

덕분에 also lives on as a courtesy formula. When someone asks 잘 지내셨어요?, a classic reply is 네, 덕분에요. ("Yes, thanks to you."), even if the person did nothing in particular. It's a small bow in words.

In casual conversation, people often express blame with plain 때문에 (날씨 때문에); 탓에 sounds a little more formal and makes the blame explicit. 때문에 is neutral, 덕분에 is grateful, 탓에 points a finger.

👁️ -길래: "Seeing That…, I…"

-길래 explains why you did something by pointing to what you noticed or heard. It tells a tiny story: stimulus, then your reaction.

-길래 has a second life in questions, where it expresses curiosity or disbelief about what could justify something: 도대체 무슨 일이길래 그렇게 웃어요? ("What on earth happened that you're laughing so much?") · 얼마나 맛있길래 줄이 이렇게 길어요? ("Just how good is it, that the line is this long?")

📺 (으)로 인해(서): The News Anchor's "Due To"

N(으)로 인해(서) is formal and written. You'll meet it in news, announcements and official notices, and you'll want it for TOPIK writing. Before a noun it becomes (으)로 인한.

Don't use it for everyday personal reasons (*늦잠으로 인해 늦었어); it would sound like you are reading your own news report.

🤷 -아서 그런지: "Maybe It's Because…"

Sometimes you notice a result and can only guess at the reason. -아서 그런지 (literally "whether it's so because…") hedges the cause, and it connects neatly with the guessing grammar from Lesson 4.

Form it from the -아서 form you already know (추워서, 자서, 주말이라서) plus 그런지. The last example shows the related sentence-final -아서 그런가 보다: "it must be because…".

📊 Which One? The Excuse Decision Table

💬 Dialogue: A Rough Morning

🌏 Culture Note: apologise first, explain second. In a Korean workplace, an explanation that comes before the apology can sound like 핑계 (an excuse). The usual order is 죄송합니다 first, then a short reason with -는 바람에 or -느라고, then what you'll do about it. People even flag it themselves: 핑계 같지만… ("This may sound like an excuse, but…"). Notice how Minho does exactly this with his team leader, while with his colleague 수아 he's more relaxed.

📰 Reading: 퇴근길 폭우

A short news report. News articles are written in 한다체, the plain written style (내렸다, 되었다, 말했다). You met these forms in reported speech; you'll study written style fully in Lesson 21.

Seven "because" forms, each with its own rules, is a lot. If you catch yourself falling back on -아서 in conversation, that's fine: it is always understood. Growth at B1 often looks like this: you start noticing -느라고 and -는 바람에 in dramas weeks before you use them, and one day an excuse comes out of your mouth fully formed. Noticing is progress.

✏️ Practice

🧠 Check Your Understanding

❓ Common Questions

🔮 Looking Ahead

Reasons explain why something happened; contrasts weigh one thing against another. In Lesson 7: Contrast & Concession, you'll learn -아도 and -더라도 ("even if"), -는데도 ("even though"), -기는 하지만 ("it's true that…, but"), -는 반면에 and -는 대신에, the grammar for talking about pros and cons.