YOU SAID:

a black cat ate a blue donkey and was very sad

INTO JAPANESE

黒猫が青いロバを食べてとても悲しかった

BACK INTO ENGLISH

The black cat ate the blue donkey and was very sad.

INTO JAPANESE

黒猫は青いロバを食べてとても悲しかったです。

BACK INTO ENGLISH

The black cat ate the blue donkey and was very sad.