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Hercus describes Nguwa as an 'auxiliary verb' on p 46 and 47 of Victorian Languages a late survey. An auxiliary verb becomes the head word in a sentence and can take the subject marker eg 'anda' (I). In the sentence 'Nguanda tyerrika' (I don't want to stand) the main verb 'tyerrika' (to stand) has the tense ending only - 'a' for present tense. 'nguanda tyerrika' literally 'unwilling-I stand'.