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.

I mean, without having to ROB anything.
Money Heist Season 3, Episode 5

...can ROB one of knowledge...
The Big Bang Theory Season 8, Episode 22

So I paid two men
who promised not to come ROB us later.
The Big Bang Theory Season 10, Episode 15

Whose idea was it to ROB the security van?
Yours or your boyfriend’s?
Money Heist Season 1, Episode 9

-With a bare cock you ROB.
-Don’t’ be dirty-minded.
Money Heist Season 1, Episode 13