YOU SAID:

Before i went to the party i was working at my deceased dads store

INTO JAPANESE

パーティーに行く前は、亡くなったお父さんの店で働いていました。

BACK INTO ENGLISH

Before going to the party, I worked at the store of my deceased father.

INTO JAPANESE

パーティーに行く前は、亡くなった父の店で働いていました。

BACK INTO ENGLISH

Before going to the party, I worked at my deceased father's shop.

INTO JAPANESE

パーティーに行く前は、亡くなった父の店で働いていました。

BACK INTO ENGLISH

Before going to the party, I worked at my deceased father's shop.