This article was originally published on mentalfloss.com as 6 Grammar Rules You Can Break. Throw the grammar rulebook out the window.

Joe embarrasses his daughters by showing off his dance skills (during) the Taylor Swift concert. I locked my keys (inside) my car again. Here’s where the old-school grammarians will wag their fingers ...

Locate the boundary between two separate sentences by reading each out loud. Each sentence should have its own subject and verb and be able to stand on its own. Mark the boundary with a line, if ...