YOU SAID:

my dad came back from the store

INTO JAPANESE

私の父は店から戻ってきました

BACK INTO ENGLISH

My dad is back from the store

INTO JAPANESE

お父さんがお店から帰ってきました

BACK INTO ENGLISH

Dad is back from the store

INTO JAPANESE

お父さんが店から帰ってきた

BACK INTO ENGLISH

Dad is back from the store