YOU SAID:
Hello I don't know why I'm doing this.
INTO JAPANESE
こんにちは私はなぜこれをやっているのかわかりません。
BACK INTO ENGLISH
Hello I do not know why I am doing this.
INTO JAPANESE
こんにちは私はなぜこれをやっているのかわかりません。
BACK INTO ENGLISH
Hello I do not know why I am doing this.
That didn't even make that much sense in English.