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.

Well, now comes
your most WONDERFUL moment.
Money Heist Season 3, Episode 3

Well, you're a WONDERFUL teacher.
Game of Thrones Season 5, Episode 2

Uh-huh, WONDERFUL.
The Big Bang Theory Season 5, Episode 23

It sounds WONDERFUL.
Game of Thrones Season 2, Episode 5

It's WONDERFUL to meet you, Aunt Lysa.
Game of Thrones Season 4, Episode 5