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.

...and you go in the can
for FELONY tax evasion.
Breaking Bad Season 3, Episode 9

you'd save yourself
a potential FELONY two-spot
Breaking Bad Season 4, Episode 2

Yeah, and FELONY quantity.
Breaking Bad Season 2, Episode 8

That's not a shot, that's a FELONY.
The Big Bang Theory Season 3, Episode 6

is a second degree FELONY.
Breaking Bad Season 2, Episode 4