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.

Subtracted your OVERHEAD
in salary,
Breaking Bad Season 4, Episode 2

{\i1}And for a few minutes ago, helicopters{\i0}
{\i1}have been heard OVERHEAD as well.{\i0}
Money Heist Season 3, Episode 4

There's so much OVERHEAD
that I can't afford to shut down.
Breaking Bad Season 3, Episode 13

Did you see three dragons flying
OVERHEAD when you arrived?
Game of Thrones Season 7, Episode 3