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.

Thanks, Grandma.
The Big Bang Theory Season 12, Episode 24

Grandma, this is Jesse.
He's from the meeting.
Breaking Bad Season 3, Episode 11

Wow. You know,
the last time I saw my GRANDMA,
The Big Bang Theory Season 9, Episode 14

Isn't that the best?
She's like Grandma Spider-Man.
The Big Bang Theory Season 9, Episode 14