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.

Informal PROTEST.
The Big Bang Theory Season 1, Episode 13

- Formal PROTEST.
- Denied.
The Big Bang Theory Season 1, Episode 13

- Formal PROTEST.
- On what grounds?
The Big Bang Theory Season 1, Episode 13

Protest. Struggle.
Breaking Bad Season 3, Episode 12

- Did you PROTEST? Vociferously?
- Yes. No.
The Big Bang Theory Season 2, Episode 7