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.

Some-- Some RABID dog.
Breaking Bad Season 5, Episode 12

but one day he showed up RABID
Breaking Bad Season 5, Episode 12

She'll maul you like a RABID wolverine.
The Big Bang Theory Season 2, Episode 20