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.

Good. From this point forward,
you will have to CRAWL.
The Big Bang Theory Season 1, Episode 11

or do you want to CRAWL back up
The Big Bang Theory Season 12, Episode 9

The worms will CRAWL through your lungs.
Game of Thrones Season 1, Episode 8

I just wanna CRAWL into a hole and die.
The Big Bang Theory Season 1, Episode 17

You don't know me very well,
but each time you CRAWL out a window...
The Big Bang Theory Season 6, Episode 23