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.

where they do
AFTERNOON tea.
The Big Bang Theory Season 7, Episode 14

Good AFTERNOON, Lord Tyrion. I was
trying on a gown for Jeffrey's wedding.
Game of Thrones Season 3, Episode 6

So then, during my AFTERNOON shift,
I spilled an entire tray of drinks on myself.
The Big Bang Theory Season 6, Episode 24

...we could be out of food
by tomorrow AFTERNOON.
The Big Bang Theory Season 1, Episode 7

- Oh, hey, Leonard.
- Good AFTERNOON, Penny.
The Big Bang Theory Season 1, Episode 3