I Know in Korean

Hi guys, it’s your Korean teacher Jun! I know! I know it! I know him! These phrases are essence of our language life. It’s alway great to say it when you actually know something or when you just want to pretend to know something both lol. Today we are going to learn how to say I know in Korean

Warm Up Your Brain

You can really easily find the word ‘know’ in Korean dramas or songs. Can you guess what it is?

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I Know in Korean Featured

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How To Say I Know in Korean


I know


Basic form : 알다
반말(informal non-honorific) form : 알아
Negative form with 해요 speech style : –


알아요 in Korean literally means that you know or understand something. Actually, 알다 seems like an informal verb of 이해하다 which means understand in Korean. 알다 can’t be used to showing you agree something like ‘I know right?’. 알다 can be very complicated when it’s used with other tenses.

In Past Tense

The past form 알았어요 is similar to ‘I knew’ but different. 알았어요 is used as ‘I understand’, ‘I understood’, ‘I got it’. You can’t use 알았어요 when you know something in the past but no longer. For that case, 알았었어요 is much more natural

In Future Tense

The future form 알거에요 is also different. 알거에요 already implies that the subject knows not the subject will know in the future (not always though). You can use to guess someone may know something. If you want to say ‘will know’, then ‘알게 될거에요’ sounds much more natural and clear.

How To Use

A: 저 사람 누군지 알아요?
Do you know who he is?
B: 제 친구예요!
He’s my friend!


A: 차차씨는 무슨 말인지 알거예요
Chacha knows what I’m talking
B: 그럼 차차씨한테 물어봐야겠네요
Then I should ask it to Chacha


A: 준씨 이거 뭔지 알아요?
Do you know what it is Jun?
B: 내 마지막 자존심
My last pride

Negative Form


I don’t know


Technically, the negative form of 알아요 is 안알아요. However, that’s not much common, even Google spelling check says it’s a typo. 안알아요 sounds really unnatural to native Koreans’ ear. Use ‘몰라요’ to say ‘I don’t know’. It’s 100% natural.

Vocabulary Note

사람 [saram] : person / people / human-being
제 [je] : my [honorific]
친구 [chingu] : friend
무슨 [museun] : what
말 [mal] : word / speech / language
그럼 [geurum] : then
물어보다 [mureoboda] : to ask / to question
이거 [igeo] : this
내 [ne] : my [non-honorific]
마지막 [majimak] : late
자존심 [jajonsim] : pride