YOU SAID:
Dad went out to buy cigarettes but then never came back
INTO JAPANESE
お父さんはタバコを買いに出かけたが、戻ってこなかった
BACK INTO ENGLISH
Dad went out to buy cigarettes but did not come back
INTO JAPANESE
お父さんはタバコを買いに出かけたが、戻ってこなかった
BACK INTO ENGLISH
Dad went out to buy cigarettes but did not come back
That didn't even make that much sense in English.