YOU SAID:
my dad went for the milk then came back
INTO JAPANESE
父はミルクを飲みに行ってから戻ってきました
BACK INTO ENGLISH
My dad went to drink milk and then came back
INTO JAPANESE
父はミルクを飲みに行ってから戻ってきました
BACK INTO ENGLISH
My dad went to drink milk and then came back
That didn't even make that much sense in English.