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.

It's not a gift. It's a SKILL.
Anyone can learn it.
Game of Thrones Season 5, Episode 9

No grace, no SKILL.
A few dozen thrusts, and done.
Game of Thrones Season 3, Episode 7

And I need to update my resume
to include swimming as a special SKILL.
The Big Bang Theory Season 10, Episode 24

limited SKILL set...
Westworld Season 2, Episode 7

Your SKILL in battle?
Game of Thrones Season 2, Episode 8