YOU SAID:
Why do I do this with my time?
INTO JAPANESE
なぜ自分の時間でこれを行うのですか?
BACK INTO ENGLISH
Why do this at your own time?
INTO JAPANESE
なぜ自分の時間にこれを行うのですか?
BACK INTO ENGLISH
Why do you do this at your own time?
INTO JAPANESE
なぜ自分の時間にこれを行うのですか?
BACK INTO ENGLISH
Why do you do this at your own time?
That didn't even make that much sense in English.