2. (negative) should not - used in negation following kia.
Me whakatū he pōti mō te waipiro, kia whakaaetia, kia kaua e whakaaetia ki Te Rohe Pōtae. / A referendum should be held as to whether or not alcohol should be allowed into the King Country.
3. (negative) must not - sometimes used in negation following me.
Me kaua a Kura-mōnehu e tere te whakaae atu ina tono a Rōra kia moe rāua. / Kura-mōnehu shouldn't be in a hurry to agree when Rōra requests that they wed.
4. (negative) not - used when negating a single phrase, not the whole sentence.