YOU SAID:

do you want to know why they did it?

INTO JAPANESE

彼らがなぜそれをしたのか知りたいのか？

BACK INTO ENGLISH

Do you want to know why they did it?

INTO JAPANESE

なぜ彼らがやったのか知りたい？

BACK INTO ENGLISH

You want to know why they did it?

INTO JAPANESE

なぜやられたのか知りたいのか？

BACK INTO ENGLISH

Do you want to know why he did it?

INTO JAPANESE

彼がなぜそれをしたのか知りたい？

BACK INTO ENGLISH

You want to know why he did it?

INTO JAPANESE

なぜ彼がやったのか知りたいのか？

BACK INTO ENGLISH

You want to know why he did it?