tāua
1. (pronoun) you (one person) and I, we two, us - like all pronouns and personals, takes a when following ki, i, kei and hei but, in most dialects, does not take a when used as the subject of the sentence. Never occurs after he, te and ngā.
(Te Kākano Textbook (Ed. 2): 13, 31-32, 52-56, 64-65;)
See also tā tāua