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.

Paul. Paul Wolowitz.
The Big Bang Theory Season 11, Episode 16

Paul, could you help me
in the bedroom with these?
Breaking Bad Season 2, Episode 4

AARON PAUL: You're working with
300 background players,
Westworld Season 3, Episode 8

Oh, cool. I'll be like
a pointy-eared Paul Bunyan.
The Big Bang Theory Season 10, Episode 12

Who's Paul?
The Big Bang Theory Season 10, Episode 19