YOU SAID:

I killed the cat with the biggest spoon in the world.

INTO JAPANESE

私は世界最大のスプーンで猫を殺しました。

BACK INTO ENGLISH

I killed a cat with the biggest spoon in the world.

INTO JAPANESE

私は世界最大のスプーンで猫を殺した。

BACK INTO ENGLISH

I killed a cat with the biggest spoon in the world.