YOU SAID:

my kitten got eaten by a large platypus

INTO JAPANESE

私の子猫は大きなカモノハシに食べられた

BACK INTO ENGLISH

My kitten was eaten by a big platypus.

INTO JAPANESE

私の子猫は大きなカモノハシに食べられました。

BACK INTO ENGLISH

My kitten was eaten by a big platypus.