From today's "Garner's Usage Tip of the Day"

"Quotation of the Day: "Churchill reports that the most valuable training he ever received in rhetoric was in the diagraming of sentences. Think of it! Yet the diagraming of a sentence, regardless of the grammatical system, can be a live subject as soon as one asks not simply 'How is this sentence put together?' but rather 'Why is it put together in this way?' or 'Could the rhetorical balance and hence the desired persuasion be better achieved by writing it differently?'" Wayne C. Booth, "The Rhetorical Stance" (1963), in Contemporary Rhetoric 70, 79 (W. Ross Winterowd ed., 1975)."

Has anyone ever seen attempts at diagramming Thai sentences to assist us learners in Thai sentence construction and syntax?

I think it's a lost art. Surely, in a few hundred years, some archeologist will find a cache of grammar school papers with all these weird squiggly lines and broken up sentences and declare he's found an ancient language. For some stupid reason, diagramming still sticks in my head after all these years, even when I'm studying Thai. Haven't met a Thai who understands the concept. I doubt there are many Americans/falangs who learn it anymore.