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 CONFUSED.
Did Sheldon stop giving milk?
The Big Bang Theory Season 1, Episode 12

I'm CONFUSED again. Is he waiting, or do
we get to shoot him between the eyes?
The Big Bang Theory Season 1, Episode 12

You seem a little CONFUSED.
Breaking Bad Season 5, Episode 8

Yeah, not to be CONFUSED with the French Fry
Goodness Inventory. That's pure Cooper.
The Big Bang Theory Season 8, Episode 3

- Not that kind of CONFUSED.
- What's George Takei doing here?
The Big Bang Theory Season 4, Episode 4