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.

We are directly UNDERNEATH
the geology lab,
The Big Bang Theory Season 5, Episode 17

We saw UNDERNEATH all of that.
Westworld Season 2, Episode 9

And guess what's
UNDERNEATH this?
The Big Bang Theory Season 12, Episode 6

This guy Jesse, he's UNDERNEATH,
and the train just drives right over him.
Breaking Bad Season 5, Episode 11

I-I-I rolled my dice
UNDERNEATH the couch,
The Big Bang Theory Season 12, Episode 16