YOU SAID:
i will kill you while you sleep
INTO JAPANESE
あなたが寝ている間、私はあなたを殺すでしょう
BACK INTO ENGLISH
While you are sleeping, I will kill you
INTO JAPANESE
あなたが眠っている間、私はあなたを殺すでしょう
BACK INTO ENGLISH
While you are asleep, I'll kill you
INTO JAPANESE
あなたが眠っている間、私はあなたを殺します
BACK INTO ENGLISH
While you are asleep, I'll kill you
That didn't even make that much sense in English.