YOU SAID:

My father left to get the milk. He has not returned.

INTO JAPANESE

父は牛乳を買いに出かけました。彼は戻っていません。

BACK INTO ENGLISH

Father went out to buy milk. he's not back

INTO JAPANESE

父は牛乳を買いに出かけました。彼は帰っていない

BACK INTO ENGLISH

Father went out to buy milk. he is not back

INTO JAPANESE

父は牛乳を買いに出かけました。彼は帰っていない

BACK INTO ENGLISH

Father went out to buy milk. he is not back