YOU SAID:

I have never eaten a goldfish while playing the trombone

INTO JAPANESE

トロンボーンを演奏しながら金魚を食べたことがない

BACK INTO ENGLISH

Never played a goldfish while playing the trombone

INTO JAPANESE

トロンボーンを演奏しながら金魚を演奏したことはありません

BACK INTO ENGLISH

Never played a goldfish while playing the trombone