영어 기본지식 질문(cindy)

'간접의문문'의 형식?            

(don't know ; 모른다 ) + 의문사 + 당겼다 쏠 필요가 없다.
(wonder ; 궁금하게 여긴다. )
(ask ; 묻는다 )
(want to know ; 원한다 알기를 )

1. I don't know where I keep my key.
2. I wonder why he did it.
3. I ask why he doesn't studied English.
4. I want to know whom you loved.