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.

And you agreed to marry someone you LOATHE
for the greater good.
Game of Thrones Season 5, Episode 8

Are you mad? The Martells LOATHE us.
Game of Thrones Season 2, Episode 3