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.

Not with a bowling BALL
on their back.
The Big Bang Theory Season 7, Episode 3

So how does this work?
I throw it like a real BALL?
The Big Bang Theory Season 8, Episode 3

Little BALL of fur
The Big Bang Theory Season 1, Episode 11

Look at this idiot!
One BALL and no brains.
Game of Thrones Season 1, Episode 5

is hoping a bunch of
scientists can catch a BALL?
The Big Bang Theory Season 10, Episode 7