YOU SAID:

once upon a time a dog ate a cat and the world came to an end

INTO JAPANESE

かつて、犬は猫を食べ、世界は終わりを迎えました

BACK INTO ENGLISH

Once a dog ate a cat and the world ended

INTO JAPANESE

犬が猫を食べ、世界が終わったら

BACK INTO ENGLISH

When a dog eats a cat and the world ends

INTO JAPANESE

犬が猫を食べ、世界が終わると

BACK INTO ENGLISH

When a dog eats a cat and the world ends