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.

- Underworld Guardian.
- Underworld Guardian.
The Big Bang Theory Season 3, Episode 5

my GUARDIAN angel appeared.
Money Heist Season 1, Episode 1

- Underworld Guardian.
- Underworld Guardian.
The Big Bang Theory Season 3, Episode 5

The professor is my GUARDIAN angel,
Money Heist Season 1, Episode 6

But you never know for certain
what a GUARDIAN angel looks like,
Money Heist Season 1, Episode 1