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.

...who's been replaced with an alien POD.
The Big Bang Theory Season 2, Episode 6

- Pod.
- Yes, my lord?
Game of Thrones Season 2, Episode 10

'Cause they do, Pod.
Everyone wants to hit a fucking squire.
Game of Thrones Season 6, Episode 8

Oh, look at us,
two peas in a POD.
The Big Bang Theory Season 12, Episode 8

Pod?
Game of Thrones Season 3, Episode 1