YOU SAID:

My son ate an apple. An apple was eaten by my son

INTO JAPANESE

私の息子はリンゴを食べた。リンゴが私の息子に食べられた

BACK INTO ENGLISH

My son ate an apple. The apple was eaten by my son.

INTO JAPANESE

私の息子はリンゴを食べた。そのりんごは私の息子に食べられた。

BACK INTO ENGLISH

My son ate an apple. The apple was eaten by my son.