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.

I'm sure he loves me dearly, as any
father loves his child, his baby BOY.
Game of Thrones Season 3, Episode 1

The BOY I beheaded...
Game of Thrones Season 1, Episode 1

I like you, BOY.
Game of Thrones Season 3, Episode 5

You hear them, BOY?
Game of Thrones Season 1, Episode 8

I know you're a BOY.
Vikings Season 1, Episode 6