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're clear to ENTER,
but it's a fuckin' mess.
Westworld Season 2, Episode 3

This is where we ENTER
the city. Very few guards. They know me.
Game of Thrones Season 3, Episode 9

We are about to ENTER Atzel's fortress.
The Big Bang Theory Season 2, Episode 3

No one will ENTER.
Game of Thrones Season 1, Episode 9

We ENTER these negotiations with open eyes.
Game of Thrones Season 6, Episode 4