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.

♪ Two hearts beating in time
The RHYTHM as one ♪♪
Breaking Bad Season 4, Episode 7

It's the RHYTHM.
Game of Thrones Season 3, Episode 7

No, no, not at all. I don't have
the slightest sense of RHYTHM.
Money Heist Season 1, Episode 6

Look, your theory is fucking shit,
but the RHYTHM is catchy.
Money Heist Season 3, Episode 5

(RHYTHM and blues playing)
The Big Bang Theory Season 5, Episode 5