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.

undergrad in a leather JACKET
The Big Bang Theory Season 7, Episode 17

What the fuck are you doing
with my JACKET, piece of crap?
Money Heist Season 1, Episode 9

It's right off the dust JACKET
of my mom's last book.
The Big Bang Theory Season 5, Episode 12

If you find this too cold,
then put on a JACKET.
The Big Bang Theory Season 9, Episode 10

You can’t shoot him
because he stole your JACKET.
Money Heist Season 1, Episode 9