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.

Raj, don't DANGLE false hope
in front of Leonard like that.
The Big Bang Theory Season 6, Episode 20

but I watched you DANGLE your
hook in the water for years.
The Big Bang Theory Season 5, Episode 12