YOU SAID:
I do not know why I am doing this
INTO JAPANESE
なぜ私はこれをやってるかわからないです。
BACK INTO ENGLISH
Why I don't know what I'm doing this.
INTO JAPANESE
私は私がやっているかわからないなぜこれ。
BACK INTO ENGLISH
And why I'm doing I do not know this.
INTO JAPANESE
私がこれを知らないてんです。
BACK INTO ENGLISH
I'm I don't know this.
INTO JAPANESE
私はこれを知らない。
BACK INTO ENGLISH
I do not know this.
INTO JAPANESE
分かりません。
BACK INTO ENGLISH
I don't understand.
INTO JAPANESE
分かりません。
BACK INTO ENGLISH
I don't understand.
That didn't even make that much sense in English.