Word Example from TV Shows
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.

...is tackled behind the LINE
of scrimmage.
The Big Bang Theory Season 3, Episode 6

- Wait!
- Keep in LINE! Get in LINE!
Game of Thrones Season 5, Episode 8

This isn't about the bloody
LINE of succession.
Game of Thrones Season 1, Episode 7

Guard those wagons! Form a LINE!
Game of Thrones Season 7, Episode 4

You can either cross the LINE