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.

...BECAUSE, you know, that's for VIPs,
and you guys are just, you know, P's.
The Big Bang Theory Season 2, Episode 4

They followed me BECAUSE they respected me.
Game of Thrones Season 5, Episode 1

Maybe BECAUSE I'm so interesting
all by myself.
The Big Bang Theory Season 5, Episode 24

BECAUSE I totally believed
that the woman you reported
The Big Bang Theory Season 12, Episode 9

Maybe BECAUSE I'm crazy?
The Big Bang Theory Season 3, Episode 10