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.

You'd POSE as a scullion.
Game of Thrones Season 2, Episode 3

And this is me doing
the Titanic POSE on the boat.
The Big Bang Theory Season 7, Episode 2

...then POSE questions to each other.
- It's fun for ages 8 to 80. Join us.
The Big Bang Theory Season 4, Episode 3

lf you're going to POSE as a commoner,
you should do it properly.
Game of Thrones Season 2, Episode 7

Okay, and tree POSE.
The Big Bang Theory Season 10, Episode 19