Summary

George Grey Vocabulary of the Aboriginal Language of Western Australia (1839)

Without attempting to enter into any of the details of the grammar of a language which is yet but so imperfectly known, it is still necessary to give such a general outline of certain parts of it as will enable any person who employs the following vocabulary to use the plural number, to discriminate between the different degrees of comparison of the adjectives, to employ, when necessary, the different moods and tenses of the verbs-in fact, to give such short and general rules as will suffice for all ordinary occasions.
Source: Wikisource

George Grey Vocabulary of the Aboriginal Language of Western Australia (1839)

No change takes place in the singular or plural number of the various tenses, and the different persons of a tense are formed by the mere addition of the characteristic pronouns.
All verbs have also a participle past, but I am unable to give any general rule for the formation of this participle.
Upon the proper use of the pronouns it is necessary to bestow the greatest care, for they are not only very complicated, but a slight change in the termination of one of them will altogether alter the force and meaning of a sentence
Source: Wikisource

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