YOU SAID:
My cat ate a rat and then got fat
INTO JAPANESE
私の猫はネズミを食べ、それから太った
BACK INTO ENGLISH
My cat ate a mouse and then gained weight.
INTO JAPANESE
私の猫はネズミを食べ、それから体重が増えました。
BACK INTO ENGLISH
My cat ate mice and then gained weight.
INTO JAPANESE
私の猫はネズミを食べた後、体重が増えました。
BACK INTO ENGLISH
My cat gained weight after eating a mouse.
INTO JAPANESE
私の猫はネズミを食べた後に体重が増えた。
BACK INTO ENGLISH
My cat gained weight after eating a mouse.
That didn't even make that much sense in English.