YOU SAID:

my dad sings marvelous

INTO JAPANESE

私の父が歌う素晴らしい

BACK INTO ENGLISH

My father sings great

INTO JAPANESE

私の父が偉大な歌う

BACK INTO ENGLISH

My father was a great sing

INTO JAPANESE

私の父は偉大な歌う

BACK INTO ENGLISH

My father is a great sing

INTO JAPANESE

私の父は偉大な歌う

BACK INTO ENGLISH

My father is a great sing