YOU SAID:
my dad left and never came back
INTO JAPANESE
私のお父さんは去って、決して戻ってきませんでした
BACK INTO ENGLISH
My dad left and never came back
INTO JAPANESE
私の父は去り、二度と戻ってきませんでした
BACK INTO ENGLISH
My dad left and never came back
That didn't even make that much sense in English.