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 Watch might send
a few men looking for a HORSE thief.
Game of Thrones Season 3, Episode 9

Distrusting me was the wisest thing
you've done since you climbed off your HORSE.
Game of Thrones Season 1, Episode 4

(HORSE NEIGHS)
Game of Thrones Season 8, Episode 2

-(MAN YELLING)
-(HORSE NEIGHS)
Westworld Season 3, Episode 8

He threw up on his HORSE on the way to
the tourney grounds. What was his name?
Game of Thrones Season 2, Episode 7