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.

Oh, I never identified
with the Rebel Alliance.
The Big Bang Theory Season 4, Episode 3

When Aerys Targaryen sat on the iron throne,
your father was a REBEL and a traitor.
Game of Thrones Season 1, Episode 3

...for our little, how should we call it,
REBEL alliance.
The Big Bang Theory Season 4, Episode 3

REBEL against their king
when they were hungry,
Game of Thrones Season 8, Episode 4

You married one REBEL and mothered another.
Game of Thrones Season 2, Episode 1