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 is a comfortable CHAIR.
The Big Bang Theory Season 5, Episode 2

A CHAIR for a King to sit upon,
Game of Thrones Season 1, Episode 7

Good thing I brought
my collapsible stick CHAIR.
The Big Bang Theory Season 9, Episode 23

I just have one question
about the CHAIR.
The Big Bang Theory Season 5, Episode 2

Thanks, I'll go grab a CHAIR.
The Big Bang Theory Season 10, Episode 16