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.

Oh, EXCUSE me.
The Big Bang Theory Season 10, Episode 24

Excuse.
Money Heist Season 1, Episode 10

- Excuse me, miss?
- Yes?
The Big Bang Theory Season 2, Episode 11

Excuse me.
The Big Bang Theory Season 8, Episode 4

Well, EXCUSE me for taking
an interest in people.
The Big Bang Theory Season 11, Episode 16