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.

♪ No ♪
♪ There is no INTELLECT in the air ♪
Breaking Bad Season 4, Episode 4

You're intimidated by Amy's INTELLECT.
To that, I say buck up.
The Big Bang Theory Season 4, Episode 3

Until I can transfer my INTELLECT
to a more durable container...
The Big Bang Theory Season 4, Episode 2

You've chosen to tangle
with a superior INTELLECT you can't defeat.
The Big Bang Theory Season 6, Episode 9