YOU SAID:

My cat ate a mouse while playing with a dice

INTO JAPANESE

私の猫はサイコロで遊んでいる間にマウスを食べて

BACK INTO ENGLISH

My cat ate a mouse while playing with dice.

INTO JAPANESE

私の猫はサイコロで遊んでいる間にマウスを食べていました。

BACK INTO ENGLISH

My cat was eating a mouse while playing with dice.

INTO JAPANESE

私の猫はサイコロで遊んでいる間にネズミを食べていました。

BACK INTO ENGLISH

My cat was eating mice while playing with dice.

INTO JAPANESE

私の猫はサイコロで遊んでいる間にネズミを食べていました。

BACK INTO ENGLISH

My cat was eating mice while playing with dice.