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.

She was always a BIT touched, but now...
You might as well kill me here.
Game of Thrones Season 1, Episode 5

- What else do we know about him?
- Quite a BIT, actually.
The Big Bang Theory Season 4, Episode 19

but things can get a BIT messy.
Game of Thrones Season 2, Episode 5

I think some of the men
are a BIT afraid of you.
Game of Thrones Season 6, Episode 7

but I am every BIT as much
a Northerner as you.
Game of Thrones Season 7, Episode 1