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.

Did it ever OCCUR to you that
Game of Thrones Season 3, Episode 4

Sheldon, did it ever OCCUR to you
that I might have other plans?
The Big Bang Theory Season 4, Episode 1

...because, A,
these festivals OCCUR in the fall...
The Big Bang Theory Season 3, Episode 15

Oh, gee, thanks, Leonard.
That didn't OCCUR to me.
The Big Bang Theory Season 3, Episode 16

Did it ever OCCUR to you that your daughter
Game of Thrones Season 3, Episode 4