Great post — your explanation of intralingual errors really made me think about how students internalize rules in the early stages. I’ve noticed some of my students keep making the same mistakes even after correction. I’ve been trying to combine classroom explanations with extra online grammar practice lately (like the structured drills on grammarexercises.org), and it seems to help reinforce rule awareness.

Do you think overgeneralization is more common at beginner or intermediate levels?