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.

I know, did you see they still have
a video RENTAL place?
The Big Bang Theory Season 9, Episode 20

Wash the RENTAL? Why?
Breaking Bad Season 5, Episode 13

these RENTAL tuxedos have been
The Big Bang Theory Season 5, Episode 23

Just wondering
who washes a RENTAL car.
Breaking Bad Season 5, Episode 9

A RENTAL agreement.
The Big Bang Theory Season 11, Episode 14