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.

- Shortly?
- A fortnight.
Game of Thrones Season 4, Episode 5

Shortly before the Battle
of Blackwater Bay.
Game of Thrones Season 4, Episode 6

The trial will begin SHORTLY.
Game of Thrones Season 6, Episode 10

You know, the artist killed himself
SHORTLY after painting that.
The Big Bang Theory Season 10, Episode 10

I married her Aunt Lysa
SHORTLY before my beloved's untimely death.
Game of Thrones Season 5, Episode 2