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.

That is his girlfriend.
Be ashamed of YOURSELF.
The Big Bang Theory Season 4, Episode 20

...you would not have it available
to stop YOURSELF from buying it.
The Big Bang Theory Season 1, Episode 14

Is that what you tell YOURSELF at night?
Game of Thrones Season 1, Episode 3

Young man, young man
Get YOURSELF off the ground
The Big Bang Theory Season 6, Episode 6

wasn't exactly
looking after YOURSELF, was it?
Game of Thrones Season 7, Episode 7