Korean Grammar: 대요 vs 데요 | What’s the Difference?
- My Korean Lesson
- 15 hours ago
- 3 min read
If you are learning Korean, you may have seen -대요 and -데요 and wondered why they sound so similar. These two Korean sentence endings are especially confusing for beginners because they sound almost identical in spoken Korean. In this post, I'll explain them!
<Table of Contents>
1. Quick Note
대요 and 데요 have different meanings and are used in different situations.
The easiest way to remember the difference is:
대요 = information from someone else
데요 = the speaker’s observation, experience, or contrast
Let’s take a closer look at how to use these two Korean grammar endings.
2. 대요 Grammar
“I heard that…” / “Apprarently…”
-대요 is used when you are reporting something that someone else said.
It is a shortened form of -다고 해요, which means “someone says that…” or “I hear that…”
For example:
민수가 내일 온대요.
→ Minsu says he is coming tomorrow.
그 식당이 맛있대요.
→ I hear that restaurant is good.
선생님이 숙제가 있대요.
→ The teacher says there is homework.
내일 비가 온대요.
→ They say it will rain tomorrow.
지수가 다음 달에 한국에 간대요.
→ Jisu says she is going to Korea next month.
A simple trick for -대요
Try replacing -대요 with -다고 해요.
If the sentence still makes sense, -대요 is probably the correct form.
온대요 → 온다고 해요
맛있대요 → 맛있다고 해요
간대요 → 간다고 해요
So, think of -대요 as a way of saying:
“This is what I heard someone say.”
If you want to learn more about 대요, please click here to read more about it.
3. -데요 Grammar
-데요 does not have one single English equivalent. The exact English translation can change depending on the context.
“I noticed…” / “It turns out…” / “Actually…”
It can be used when the speaker talks about something they personally noticed, experienced, or found out. It can also be used to introduce a contrast or gently disagree with what someone has said.
For example:
이거 생각보다 어렵데요.
→ I found this more difficult than I expected.
그 사람 정말 친절하데요.
→ I noticed that person is really kind.
저는 괜찮은데요.
→ I’m actually okay, though.
생각보다 춥데요.
→ It’s colder than I expected.
It can sometimes feel like:
“I noticed that…”
“It turns out…”
“Actually…”
“It seems…”
“...though.”
The important thing is that the speaker is not simply reporting another person’s words.
4. -대요 vs. -데요: Comparison
This is where the difference becomes much clearer.
민수가 한국에 간대요.
→ Minsu says he is going to Korea.
The speaker heard this information from Minsu or someone else. So we use -대요.
민수가 한국에 갔던데요.
→ I noticed that Minsu went to Korea.
Here, the speaker is talking about something they personally observed or found out.
So -데요 / -던데요 is used.
The two sentences may look similar, but the source of the information is different.
-대요 → someone else said it
-데요 → the speaker observed or discovered it
5. Wrap-up: 대요 vs 데요
You've learned the difference between 대요 vs 데요. Don't worry about memorizing every grammatical rule at once. Start with this simple distinction:
🗣️ 대요 = Someone said it.
👀 데요 = I noticed/experienced it, or I'm contrasting it.
For example:
민수가 내일 온대요.
→ Minsu says he's coming tomorrow.
저는 괜찮은데요.
→ I'm actually okay, though.
Once you connect 대요 with -다고 해요, it becomes much easier to recognize.
When you hear -대요 in Korean conversation, think:
“Oh, the speaker is reporting someone else's words.”
When you hear -데요, pay attention to the context and ask:
“Is the speaker describing something they noticed or expressing a contrast?”
With enough exposure to Korean conversations, the difference will start to feel much more natural.
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