(으)ㄹ 줄 모르다

Doesn't know how to

Explanation

Used to say you don't know or don't have the ability to do something.

Details

Different meaning

(으)ㄹ 줄 알다 can also mean 'I thought'.

친구가 갈 줄 알았어요.
I thought my friend would go.
친구가 가는 줄 알았어요.
I thought my friend was going.
친구가 간 줄 알았어요.
I thought my friend was gone.

Korean Grammar in Use

This pattern expresses whether one doesn't know how, or doesn't have the ability, to do something. When the verb stem ends in a vowel or ㄹ, -ㄹ 줄 모르다 is used, and when the verb stem ends in a consonant, -을 줄 모르다 is used. It corresponds to 'doesn't know how to' in English.

Details

Comparison:

Examples
휴대 전화로 사진을 <span class='focus'>보낼 줄 몰라요</span>.
I don't know how to send pictures by mobile phone.
저는 영어를 <span class='focus'>할 줄 몰라요</span>.
I don't know how to speak English.
<span class="speaker-a">A:</span> 캐럴 씨, 컴퓨터 게임 '스타크래프트'를 <span class='green'>할 줄 알아요?</span><br><br><span class="speaker-b">B:</span> 아니요, 할 줄 <span class='focus'>몰라요</span>. 어떻게 해요?
A: Carol, do you know how to play the computer game Starcraft? B: No, I don't. How do you play it?

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