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.

Its well-being is a matter of
arithmetic, not SENTIMENT.
Game of Thrones Season 7, Episode 4

Interesting. A friendly SENTIMENT
in this country...
The Big Bang Theory Season 4, Episode 20

No, no, no. Wait, I'm not done.
Allow me to underscore my SENTIMENT
The Big Bang Theory Season 9, Episode 13

It's a SENTIMENT I can express
in six languages.
The Big Bang Theory Season 1, Episode 1