YOU SAID:

On day Paul to the store and bought cow milk

INTO JAPANESE

日にポールは店に行き、牛のミルクを買った

BACK INTO ENGLISH

On the day Paul went to the store and bought cow's milk.

INTO JAPANESE

ポールが店に行って、牛乳を買った日。

BACK INTO ENGLISH

The day Paul went to the store and bought some milk.

INTO JAPANESE

ポールが店に行ってミルクを買った日。

BACK INTO ENGLISH

The day Paul went to the store and bought some milk.