YOU SAID:
Why weren't you at elf practice?!
INTO JAPANESE
なぜエルフの練習をしなかったのですか?!
BACK INTO ENGLISH
Why didn't you practice elf? !
INTO JAPANESE
なぜエルフを練習しなかったのですか? !
BACK INTO ENGLISH
Why didn't you practice elf? !
That didn't even make that much sense in English.