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 poison few in the Seven Kingdoms POSSESS.
Game of Thrones Season 4, Episode 6

...that any space-faring civilization
would have to POSSESS is touch.
The Big Bang Theory Season 8, Episode 21

You do not POSSESS at the moment.
Game of Thrones Season 3, Episode 4

You're blessed with abilities
that few men POSSESS.
Game of Thrones Season 1, Episode 7

Hang on. I know I don't POSSESS the tools
of leadership, but I don't understand...
The Big Bang Theory Season 2, Episode 23