YOU SAID:

there was once a dog who could fly

INTO JAPANESE

飛ぶことができる犬がありました

BACK INTO ENGLISH

There was a dog that can fly

INTO JAPANESE

飛ぶことができる犬がいた

BACK INTO ENGLISH

There were dogs can fly

INTO JAPANESE

犬が飛ぶことができるがあった

BACK INTO ENGLISH

There you can fly the dog

INTO JAPANESE

犬を飛ぶことができる

BACK INTO ENGLISH

You can fly a dog

INTO JAPANESE

犬を飛ぶことができます。

BACK INTO ENGLISH

You can fly a dog.

INTO JAPANESE

犬を飛ぶことができます。

BACK INTO ENGLISH

You can fly a dog.