YOU SAID:
today I decided not to practice my flute.
INTO JAPANESE
今日はフルートを練習しないことにしました。
BACK INTO ENGLISH
I decided not to practice the flute today.
INTO JAPANESE
今日はフルートを練習しないことにしました。
BACK INTO ENGLISH
I decided not to practice the flute today.
That didn't even make that much sense in English.