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.

A man with your INTELLECTUAL gifts
doesn't waste an evening...
The Big Bang Theory Season 2, Episode 6

and instead,
you tickle my INTELLECTUAL fancy.
The Big Bang Theory Season 10, Episode 19

You're just clinging to it
out of INTELLECTUAL stubbornness.
The Big Bang Theory Season 6, Episode 9

with a little INTELLECTUAL
conversation.
The Big Bang Theory Season 7, Episode 1

educational pedigree, scientific field,
INTELLECTUAL prowess and mamas.
The Big Bang Theory Season 10, Episode 19