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.

It's because of people like you
people like me can LIMIT our human contact.
The Big Bang Theory Season 8, Episode 7

Which is still no excuse
for going over the posted speed LIMIT.
The Big Bang Theory Season 4, Episode 19

Five times the LIMIT of (laughs)
'E' to the upsilon as..."
The Big Bang Theory Season 5, Episode 16

And l promise to always go
the speed LIMIT. Or below.
Breaking Bad Season 4, Episode 6

so sky's the LIMIT.
The Big Bang Theory Season 10, Episode 8