YOU SAID:

I was bit by a horse once

INTO JAPANESE

一度馬に噛まれました

BACK INTO ENGLISH

I was bitten by a horse once

INTO JAPANESE

一度馬に噛まれた

BACK INTO ENGLISH

once bitten by a horse

INTO JAPANESE

一度馬にかまれた

BACK INTO ENGLISH

was bitten by a horse once

INTO JAPANESE

一度馬に噛まれた

BACK INTO ENGLISH

once bitten by a horse

INTO JAPANESE

一度馬にかまれた

BACK INTO ENGLISH

once bitten by a horse