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.

He thinks we're UGLY.
Game of Thrones Season 3, Episode 7

How can he possibly have any
claim to that UGLY iron chair?
Game of Thrones Season 3, Episode 2

As you can see,
detoxing can get pretty UGLY.
The Big Bang Theory Season 1, Episode 10

So UGLY.
The Big Bang Theory Season 5, Episode 17

So many of my memories
were UGLY.
Westworld Season 3, Episode 8