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.

Still, somebody somewhere
is cooking that BIG blue
we keep finding.
Breaking Bad Season 2, Episode 5

Look how BIG he got.
The Big Bang Theory Season 11, Episode 14

Was my whole childhood
just one BIG experiment?
The Big Bang Theory Season 12, Episode 17

He says it's the next BIG thing
for social anxiety disorder.
The Big Bang Theory Season 4, Episode 22

Previously on
The Big Bang Theory...
The Big Bang Theory Season 12, Episode 17