YOU SAID:

I went to the store today and bought apples

INTO JAPANESE

今日は店に行って、りんごを買いました。

BACK INTO ENGLISH

I went to the store today and bought apples.

INTO JAPANESE

今日は店に行って、りんごを買った。

BACK INTO ENGLISH

I went to the store today and bought an apple.

INTO JAPANESE

今日は店に行って、リンゴを買った。

BACK INTO ENGLISH

I went to the store today and bought an apple.