YOU SAID:

My dad left to go get milk and didn't come back

INTO JAPANESE

お父さんはミルクを取りに行って帰ってこなかった

BACK INTO ENGLISH

Dad didn't go to get milk

INTO JAPANESE

お父さんは牛乳を取りに行きませんでした

BACK INTO ENGLISH

Dad didn't go get milk

INTO JAPANESE

お父さんは牛乳を取りに行きませんでした

BACK INTO ENGLISH

Dad didn't go get milk