YOU SAID:

i ran to the store to buy some re onions

INTO JAPANESE

私は店に行っていくつかの玉ねぎを買いました

BACK INTO ENGLISH

I went to the store and bought some onions

INTO JAPANESE

店に行って玉ねぎを買った

BACK INTO ENGLISH

I went to the store and bought an onion

INTO JAPANESE

店に行ってタマネギを買いました

BACK INTO ENGLISH

I went to the store and bought an onion