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.

If he commands you to burn children,
your Lord is EVIL.
Game of Thrones Season 6, Episode 10

We choose good, or we choose EVIL.
Game of Thrones Season 5, Episode 1

to differentiate EVIL from good.
Money Heist Season 1, Episode 8

Men together,
fighting the forces of EVIL.
The Big Bang Theory Season 5, Episode 19

No, no. No, no,
I-I did EVIL.
The Big Bang Theory Season 5, Episode 7