YOU SAID:

Why on Earth would I do that?

INTO JAPANESE

なぜ私はそれをするのでしょうか？

BACK INTO ENGLISH

why would i do that?

INTO JAPANESE

なぜ私はそれをするのですか？

BACK INTO ENGLISH

why do i do that

INTO JAPANESE

なぜ私はそれをするのですか

BACK INTO ENGLISH

why do i do that