(03/23/21)

-보통 언제 자?

  When do you sleep usually?  -> When do you usually go to sleep?

-그는 파티에 오고 싶어하니?

  Does he want to go to the party?  -> Does he want to come to the party?

=> Your sentence has a correct grammatical structure, but this has the correct usage/ expression.

-난 아무것도 몰랐어.

  I didn't know anything. ​​