YOU SAID:

I don't know why I am doing it

INTO JAPANESE

私はなぜ私はそれをやってるとは知らない

BACK INTO ENGLISH

Do not know I why I'm doing it

INTO JAPANESE

なぜそれをやっている私を知っていません。

BACK INTO ENGLISH

Why doing it I don't know.

INTO JAPANESE

なぜ私は知らないそれをやってください。

BACK INTO ENGLISH

Why I do not know it.

INTO JAPANESE

なぜ私はそれを知らない。

BACK INTO ENGLISH

Why don't I know it.

INTO JAPANESE

なぜ私はそれを知らない。

BACK INTO ENGLISH

Why don't I know it.