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 occasional KINDNESS will spare you
all sorts of trouble down the road.
Game of Thrones Season 1, Episode 3

As a KINDNESS,
I should probably take all the games.
The Big Bang Theory Season 10, Episode 10

I hope to repay
your KINDNESS someday.
Game of Thrones Season 1, Episode 7

It's a KINDNESS, Leonard.
The Big Bang Theory Season 6, Episode 3

because at its core, it has
KINDNESS, patience, and respect.
The Big Bang Theory Season 5, Episode 24