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.

You and Stannis cut through us
like piss through SNOW.
Game of Thrones Season 6, Episode 9

Oh, a spider! Save me, Jon Snow.
Game of Thrones Season 3, Episode 7

Never seen SNOW before.
Game of Thrones Season 7, Episode 6

I didn't know Lord Commander Snow for long,
Game of Thrones Season 6, Episode 1

Hurry, Jon Snow.
Game of Thrones Season 5, Episode 1