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.

Every time he would leave for the
capital or fight in a CAMPAIGN,
Game of Thrones Season 3, Episode 3

Amy has embarked on a CAMPAIGN
The Big Bang Theory Season 5, Episode 23

And I'm happy to report
its kickstarter CAMPAIGN
The Big Bang Theory Season 7, Episode 11

For 20 years, the spider
oversaw the CAMPAIGN to find and kill me.
Game of Thrones Season 5, Episode 8

ever invented:
Campaign for North Africa.
The Big Bang Theory Season 11, Episode 16