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.

Besides, this dump isn't gonna work
because it doesn't have a Danny.
Breaking Bad Season 3, Episode 11

Besides shortness, what genetic
weaknesses run in your family?
The Big Bang Theory Season 2, Episode 2

Besides, I'm having dinner with Amy.
The Big Bang Theory Season 6, Episode 1

But BESIDES all that,
The Big Bang Theory Season 12, Episode 15

Besides my mom's neck size.
The Big Bang Theory Season 6, Episode 8