YOU SAID:

my dad came back with the milk and I partied till twelve

INTO JAPANESE

私の父はミルクを持って戻ってきて、私は12時までパーティーをしました

BACK INTO ENGLISH

My dad came back with milk and I had a party until 12 o'clock

INTO JAPANESE

お父さんがミルクを持って帰ってきて、12時までパーティーをしました

BACK INTO ENGLISH

Dad came home with milk and had a party until 12 o'clock

INTO JAPANESE

お父さんはミルクを持って帰宅し、12時までパーティーをしました

BACK INTO ENGLISH

Dad came home with milk and had a party until 12 o'clock