It's strange, I can remember quite clearly being taught about speech punctuation in junior school, I just can't remember the detail. My 'comma muscle memory' is getting better and I do understand why most are necessary (or not, or should be semi-colons), but I can never remember all the technical explanations. As far as grammar goes, my limit is remembering what verbs, nouns, adjectives, adverbs and pronouns are.

It's not just grammar, when I learn something, I'm shockingly bad at remembering all the proper explanations of why something is done as it is, I just sort of remember the 'sense' of it. It was the same with programming.