YOU SAID:

I saw the cat on the floor before it ran away.

INTO JAPANESE

逃げる前に床の上に猫を見ました。

BACK INTO ENGLISH

I saw a cat on the floor before running away.

INTO JAPANESE

逃げる前に床に猫がいた。

BACK INTO ENGLISH

There was a cat on the floor before running away.

INTO JAPANESE

逃げる前に床に猫がいました。

BACK INTO ENGLISH

There was a cat on the floor before running away.