Level 6 Korean Grammar

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1

How about …? / ~ 어때요?

2

What do you think about …? / 어떻게 생각하세요? / 어떤 것 같아요?

3

One of the most … / 가장 ~ 중의 하나

4

Do you mind if I …? / -아/어/여도 돼요?

5

I’m in the middle of …-ing / -는 중이에요

6

Word Builder Lesson 9 / -님

7

One way or the other / 어차피

8

I’m not sure if … / -(으/느)ㄴ지 잘 모르겠어요.

9

While you are at it / -(으)ㄴ/는 김에

10

Sentence Building Drill 6

11

I mean… / 그러니까, 제 말 뜻은, -라고요, 말이에요

12

What do you mean? What does that mean? / 무슨 말이에요?

13

Word Builder 10 - 과(過)

14

“/ (slash)” or“and” / -(으)ㄹ 겸

15

The thing that is called, what they call … / -(이)라는 것

16

Suffix -겠-

17

let me tell you… / -거든(요)

18

Either A or B, Or / -거나, -(이)나, 아니면

19

To improve, to change, to increase / -아/어/여지다 Part 2

20

Sentence Building Drill 7

21

Passive Voice – Part 1

22

Word Builder 11 / 무 (無)

23

Passive Voice – Part 2

24

I DID do it, I DO like it / -기는 하다

25

Easy/difficult to + V / -기 쉽다/어렵다

26

I thought I would …, I didn’t think you would … / -(으)ㄴ/ㄹ 줄 알다

27

Can, to be able to, to know how to / -(으)ㄹ 수 있다, -(으)ㄹ 줄 알다

28

It depends on … / -에 따라 달라요

29

Sometimes I do this, sometimes I do that / 어떨 때는 -고, 어떨 때는 -아/어/여요

30

Sentence Building Drill 8

I’m not sure if … / -(으/느)ㄴ지 잘 모르겠어요.

안녕하세요! In this lesson, we will be looking at how to say “I’m not sure if…” in Korean by using the structure -(으/느)ㄴ지 잘 모르겠어요. As with many other aspects of the Korean language, it’s important to remember that this structure is not going to be translated word for word, so make sure you check out the lesson to learn more about it!

In this lesson, let’s take a look at how to say “I’m not sure if...” in Korean. First of all, you need to remember that this is not going to be translated word for word.


“To be sure” and “to not be sure” in Korean


The word for “to be sure” or “to be certain” in Korean is 확실하다. Therefore, the literal translation of “to not be sure” is 확실하지 않다, but this form is not commonly used in everyday spoken Korean.

확 = certain

실 is used in the word 사실 which means “a fact”.


“Are you sure?”

When asking someone if they are sure or certain of something, you can still use the word 확실하다 and say, “확실해요?”. Sometimes you can also say, “정말이에요?” if you want to say “Are you serious?” or “Is that real?”.


How to say “I’m not sure”

The most natural Korean expression for “I’m not sure” is, “잘 모르겠어요”. The word 모르다 means “to not know” and if you say, “잘 몰라요” it means “I don’t know well.” or “I don’t know much (about it).”


Ex)

스포츠 잘 몰라요. = I don’t know about sports.


The suffix -겠- adds the nuance of assumption or intention (-겠- will be covered in more detail in a future lesson in Level 6), so when you say 모르겠어요, you mean “I don’t seem to know” or “I would like to know, but I really don’t.”

잘 모르겠어요 means the same thing as 모르겠어요 because you don’t actually need to use the word “잘”, but “잘 모르겠어요” is such a common and fixed expression that many Korean people use it to mean “I’m not sure” or “I don’t know for sure.”


How to say “I’m not sure if...”

“If ___ or not” or “whether or not” in Korean is expressed through the structure -(으)ㄴ/는지 (Go back to Level 5 Lesson 18 to review).


-(으)ㄴ/는지 잘 모르겠어요 = I’m not sure if…

You can use interrogative words (when/what/where/how/who/why/which) with this structure, too.


Present Tense

-(으)ㄴ/는지 잘 모르겠어요.


Ex)

이거 누구 책인지 잘 모르겠어요.

= I’m not sure whose book this is.


Past Tense

-았/었/였는지 잘 모르겠어요.


Ex)

다 끝났는지 잘 모르겠어요.

= I’m not sure if it all ended.


Future Tense

-(으)ㄹ지 잘 모르겠어요.

-(으)ㄹ 건지 잘 모르겠어요.


Ex)

서점이 내일 문을 열지 잘 모르겠어요.

= I’m not sure if the bookstore will be open tomorrow.

서점이 내일 문을 열 건지 잘 모르겠어요. 

= I’m not sure if the bookstore will be open tomorrow.


If you want to add “or not” at the end, you can use the structure Verb stem + -(으)ㄴ/는지 + Verb stem + 안 -(으)ㄴ/는지.


Sample Sentences

어디로 갈지 잘 모르겠어요. 

= I’m not sure where we will go.


내일 만날지 안 만날지 잘 모르겠어요.

= I’m not sure if we will meet tomorrow or not.

* If you want to emphasize “we” you can add “우리” at the beginning of the sentence.


여기가 맞는지 잘 모르겠어요.

= I’m not sure if this is the right place.


뭘 해야 될지 잘 모르겠어요.

= I am not sure what to do.

= I am not sure what I (will) have to do.


이게 무슨 뜻인지 잘 모르겠어요.

= I’m not sure what this means.

* “이게” has the same meaning as “이것이” which means “this is”.

안녕하세요! In this lesson, we will be looking at how to say “I’m not sure if…” in Korean by using the structure -(으/느)ㄴ지 잘 모르겠어요. As with many other aspects of the Korean language, it’s important to remember that this structure is not going to be translated word for word, so make sure you check out the lesson to learn more about it!
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