YOU SAID:

Dad left for milk when i was 7

INTO JAPANESE

7歳の時に父親が牛乳を買いに出かけた

BACK INTO ENGLISH

When I was seven, my father went out to buy milk.

INTO JAPANESE

私が７歳のとき、父は牛乳を買いに出かけた。

BACK INTO ENGLISH

When I was seven, my father went out to buy milk.