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 noticing an IMMEDIATE
lowering of my inhibitions.
The Big Bang Theory Season 3, Episode 11

Your boy is in no IMMEDIATE danger,
this I swear to you.
Game of Thrones Season 6, Episode 3

Get ready for IMMEDIATE intervention.
Money Heist Season 3, Episode 8

and the IMMEDIATE release
of Missandei of Naath.
Game of Thrones Season 8, Episode 4

- I have no IMMEDIATE plans.
- If that changes, let me know.
The Big Bang Theory Season 2, Episode 19