YOU SAID:

Once upon a time there was a tiny unicorn.

INTO JAPANESE

かつて、小さなユニコーンがあった。

BACK INTO ENGLISH

There used to be a small unicorn.

INTO JAPANESE

以前は小さなユニコーンだった。

BACK INTO ENGLISH

Previously it was a small unicorn.

INTO JAPANESE

以前は小さなユニコーンでした。

BACK INTO ENGLISH

Previously it was a small unicorn.