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.

And I want all your phones in this BIN.
Money Heist Season 3, Episode 4

Und ich BIN eine pretzel!
The Big Bang Theory Season 5, Episode 14

What are you now? Bin Laden?
Money Heist Season 3, Episode 6

Ich BIN ein Bavarian.
The Big Bang Theory Season 5, Episode 14

Und ich BIN ein a pretzel.
The Big Bang Theory Season 12, Episode 24