YOU SAID:

I'm running to the store to get some milk

INTO JAPANESE

牛乳を買いに店に走ってる

BACK INTO ENGLISH

I'm running to the store to buy milk

INTO JAPANESE

牛乳を買いに店に走っている

BACK INTO ENGLISH

running to the store to buy milk

INTO JAPANESE

牛乳を買いに店に走る

BACK INTO ENGLISH

run to the store to buy milk

INTO JAPANESE

牛乳を買いに店に走る

BACK INTO ENGLISH

run to the store to buy milk