"Grammar" comprises spelling, punctuation, and usage. It's not just parts of speech.
"Grammar" comprises spelling, punctuation, and usage. It's not just parts of speech."
Although grammar does include the study of the "forms and structures of words," in American English it most typically means they're, there, their arrangement in phrases and sentences. That does spill over into grammar win, when homonyms are involved, butt, but most word folks I no, know think of it as a misspelling, knot, not a grammar error.