I learned a bit of sentence diagramming, but that way of teaching grammar was falling out of favor in the 1970s. I don’t know whether that hurt my education. Some people swear by the practice, but I think that it appeals mostly to people who think visually. Not everyone learns that way. What struck me about diagramming is how short-lived it was as a teaching technique. It was devised in the 1870s and was passe by the 1970s.
If you would like to know more about diagramming, the Guide to Grammar and Writing has a good explanation. You can click on a PowerPoint program if your computer is so equipped. You can find out about diagramming here and here.
You can read the original schoolbook that introduced diagramming, An Elementary English Grammar by Alonzo Reed and Brainerd Kellogg.
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