When I graduated 8th grade, I could diagram a sentence frontward, backward, and in my sleep. I doubt I could diagram my way out of a paper bag today.
This is where my love of grammar and the English language began. This love, or possibly obsession, instilled in me proper sentence structure and syntax.
Most of what I know about sentence structure is so ingrained in me I know it's correct, even if I cannot recite the rule.
If you are interested in having me edit your manuscript, contact me at JABoling805@gmail.com for an editing quote. Include your genre and word count.