YOU SAID:

the quick cat fell into the river and jumped on the poor dog

INTO JAPANESE

足の速い猫は川に落ちてかわいそうな犬に飛びついた

BACK INTO ENGLISH

The fast cat fell into the river and jumped on the poor dog.

INTO JAPANESE

足の速い猫は川に落ちて、かわいそうな犬に飛びかかりました。

BACK INTO ENGLISH

The fast cat fell into the river and pounced on the poor dog.

INTO JAPANESE

足の速い猫は川に落ちてかわいそうな犬に飛びつきました。

BACK INTO ENGLISH

The fast cat fell into the river and jumped on the poor dog.

INTO JAPANESE

足の速い猫は川に落ちて、かわいそうな犬に飛びかかりました。

BACK INTO ENGLISH

The fast cat fell into the river and pounced on the poor dog.

INTO JAPANESE

足の速い猫は川に落ちてかわいそうな犬に飛びつきました。