It’s a fairly simple idea,” says Kitty Burns Florey, the author of Sister Bernadette’s Barking Dog: The Quirky History and Lost Art of Diagramming Sentences. “I like to call it a picture of language. It really does draw a picture of what language looks like.
When you think about a sentence, you usually think about words — not lines. But sentence diagramming brings geometry into grammar.
Read this fascinating article on NPR.org. I’m going to start drawing out my sentences to see if it enhances or expands my ability to understand the “geometry of my grammar”. Think I’ll drink a cup of coffee before commencing this mental endeavor!