1. (determiner) your (one person) - when talking of one thing. A possessive determiner which must be followed by a noun, unlike tāu and tōu. This is the neutral or informal form and is not governed by the a and o categories.
Utaina tō kōneke ki runga i te taraka. / Load your sledge onto the truck, please.
(Te Kākano Textbook (Ed. 2): 52-56, 58; Te Kākano Study Guide (Ed. 1): 1;)
2. (determiner) belonging to. Combines with the dual and plural personal pronouns.
Nō reira ka rapu ngā tamariki i tō rātou pāpā (JPS 1911:94). / And so, the children searched for their father.
(Te Kākano Textbook (Ed. 2): 52-56;)
3. (determiner) has, have, own, owns (a possessive).
He motokā tō Hēni. / Jane owns a car.
(Te Kākano Textbook (Ed. 2): 108-110;)
4. (determiner) that of, the one of, the ... of. Used as an alternative form for te ... o.
Ko tō Ngāti Tīpā takiwā tēnei. / This is Ngāti Tīpā's territory.
(Te Pihinga Textbook (Ed. 2): 126;)
5. Used in the ways of 2 to 4 above when the possessor has, or had, no control of the relationship or is subordinate, passive or inferior to what is possessed.
(Te Kākano Textbook (Ed. 2): 54-56, 140-141;)