The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

The GROCERY store
is a few blocks away.
The Big Bang Theory Season 7, Episode 23

Every day, people go
to the GROCERY store
The Big Bang Theory Season 5, Episode 12

Going to the GROCERY store,
driving you to the doctor.
The Big Bang Theory Season 10, Episode 10

I'll tell you what,
why don't you
do the GROCERY shopping?
Breaking Bad Season 2, Episode 7

And I will be with two or three kids
and GROCERY bags.
Money Heist Season 3, Episode 7