Ka haere māua.
We (2, excluding the listener) will go.
Scenario: Tama and Mere are going to go. They tell Whaea Mahinaarangi that they are going to go. Tama says "E Whaea, Ka haere māua" which mean "Whaea we (2 excl) will go". Whaea knows that it is Tama and Mere that are going not Tama and Whaea, as Tama used the exclusive pronoun for two people, māua.