swiftnicholas wrote:Could anybody comment on this, perhaps noting the passive voice as well? Or maybe suggest something else I could read?
You will want to read Carl Conrad's papers: Active, Middle, and Passive: Understanding Ancient Greek Voice
. That document has URLs for other PDFs talking about various verb matters, most related to voice.
I agree that transitivity and its relationship to voice is not usually well covered in the standard grammars and especially primers. I myself can't offer much in the way of formal insight into Greek transitivity, but I can mention a few things I've found useful.
First, when a verb has both first and second aorists (or passives), the second one will usually be intransitive, the first transitive, regardless of the conjugation.
Second, love your dictionary.
In particular, the Middle Liddell and the Great Scott. The citations and examples will nearly always make clear the transitivity of the verb, and how the transitivity might change from voice to voice.
Finally, I think your idea that the middle voice might indicate a transitivity switch is basically sound, at least for verbs which also have active forms.