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.

No, no, this whole THING,
all of this...
Breaking Bad Season 4, Episode 6

Why can't you do one THING I say?
Breaking Bad Season 5, Episode 14

If that's all it takes,
it's a good THING you don't have a dog.
The Big Bang Theory Season 6, Episode 2

the most exciting THING was watching
the ash of her cigarette get longer
The Big Bang Theory Season 9, Episode 14

And the first THING will be getting
the ambassador’s daughter out of there.
Money Heist Season 1, Episode 7