Here are some grammar lessons as audio files. They were made by Murray Garde originally for learner's of Bininj Kunwok working in land management projects on the Arnhem Land Plateau, but they are generally useful for any learners.
These lectures are about the pronoun prefixes that go on verbs. You can read some more about these on this blog post.
The following lectures introduce some common verbs and how they change according to the tense, aspect and mood.
That is all.