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.

- Don't leave me alone with these people.
- I'm sorry, I've begun the FEAST a bit early.
Game of Thrones Season 1, Episode 1

That we hit first and hit hard
and leave a FEAST for the crows.
Game of Thrones Season 5, Episode 8

and sit down to a FEAST of ham and potatoes
Game of Thrones Season 3, Episode 4

Well, look at him. He's a walking FEAST.
Game of Thrones Season 3, Episode 3

Feast over yet, is it?
Game of Thrones Season 3, Episode 9