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

...forcing me to CRAWL through the window
of a lovely Armenian family...
The Big Bang Theory Season 1, Episode 14

...to CRAWL back into her spacious womb.
The Big Bang Theory Season 6, Episode 9

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

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