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.

He's BENT the knee.
Game of Thrones Season 7, Episode 7

...BENT over the hood of a Porsche.
The Big Bang Theory Season 8, Episode 7

Oh, he's all BENT out of shape about
having a Roommate Agreement meeting.
The Big Bang Theory Season 9, Episode 21

Your Grace, the world has got so far BENT.
Game of Thrones Season 3, Episode 10

...with the names BENT into tortured puns.
The Big Bang Theory Season 6, Episode 5