Work through Sentence Diagrams - Tutorial No. 1 and No. 2 before you do this one.
In this tutorial I will show you how to actually draw a diagram. Yes, I mean with a piece of paper and a pen or pencil. That's what you need to do if you want to learn this as quickly and as thoroughly as possible. Drawing the diagrams burns them into your muscle memory, making it easier to remember. So this tutorial is all on video.
We'll work through the diagrams for a sentence before and after editing. It's yet another example of what a wonderful tool diagramming is, both for learning grammatical structure and for analysing troubled sentences.
Click on the video icon below, to see how it's done in the real world. Forgive the rough sound quality; I'm working with two different recording systems.