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.

But how do we APPLY
quantitative metrics
The Big Bang Theory Season 11, Episode 12

No. I mean, I'll APPLY,
but I'm not gonna stoop to playing politics.
The Big Bang Theory Season 6, Episode 20

Standard Robotic
Fighting League rules APPLY.
The Big Bang Theory Season 2, Episode 12

Think of me
when you APPLY it.
The Big Bang Theory Season 7, Episode 2

when we APPLY for grants.
The Big Bang Theory Season 7, Episode 14