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.

- Which are you?
- Armourer's APPRENTICE.
Game of Thrones Season 1, Episode 10

You said I could be your APPRENTICE.
Game of Thrones Season 5, Episode 3

What does a dyer's APPRENTICE
know about battles anyway?
Game of Thrones Season 2, Episode 2

Gendry's an armorer's APPRENTICE.
Game of Thrones Season 2, Episode 2

Even a smith's APPRENTICE
can do better than "really bad."
Game of Thrones Season 8, Episode 2