GFrammar is not really taught in the public schools anymore because admitting the existence of it is deemed to be offensive to a certain pet minority.
In my case, grammer is not used because I’m not using my reading glasses, typing ong my phone which makes changes I fail to motice, and after living for 65 years and surviving a triple by-pass have trouble with some words.
But I count on my fellow fr’s to understand what I wrote.