YOU SAID:

i ate the cat because he ate a mouse

INTO JAPANESE

彼はネズミを食べたので、私は猫を食べ

BACK INTO ENGLISH

He ate a mouse, so I ate a cat.

INTO JAPANESE

彼はネズミを食べ、私は猫を食べた。

BACK INTO ENGLISH

He ate a mouse and I ate a cat.

INTO JAPANESE

彼はネズミを食べ、私は猫を食べに行った。

BACK INTO ENGLISH

He ate a mouse and I went to eat a cat.

INTO JAPANESE

彼はネズミを食べ、私は猫を食べに行きました。

BACK INTO ENGLISH

He ate a mouse and I went to eat a cat.