YOU SAID:

my big pen15 ate a horse that was eating a pen15

INTO JAPANESE

私の大きな pen15 を食べた、pen15 を食べていた馬

BACK INTO ENGLISH

Horses were eating eat my big pen15 pen15

INTO JAPANESE

馬が食べていた私の大きな pen15 の pen15 を食べる

BACK INTO ENGLISH

Eat me were eating horses big pen15 pen15

INTO JAPANESE

私を食べる馬大 pen15 pen15 を食べていた

BACK INTO ENGLISH

Horses large eat I ate pen15 pen15

INTO JAPANESE

大きな馬を食べる pen15 pen15 を食べました

BACK INTO ENGLISH

Pen15 pen15 to eat a big horse ate.

INTO JAPANESE

大きな馬を食べる Pen15 pen15 を食べた。

BACK INTO ENGLISH

Pen15 pen15 to eat a big horse ate.