YOU SAID:

my dad went to the store to buy milk but never came back

INTO JAPANESE

父は牛乳を買いに店に行ったが、戻ってこなかった

BACK INTO ENGLISH

My father went to the store to buy milk, but he didn't come back

INTO JAPANESE

父は牛乳を買いに店に行ったが、戻ってこなかった。

BACK INTO ENGLISH

My father went to the store to buy milk, but he didn't come back.

INTO JAPANESE

父は牛乳を買いに店に行ったが戻ってこなかった。

BACK INTO ENGLISH

My father went to the store to buy milk, but he didn't come back.