Kia ora! This week covers 'When'. I had many examples to cite from Harlow. Hopefully it makes sense and you find it useful.

Harlow, A Maori Reference Grammar. pg 216

1. Kia - Kia mutu te ua, ka haere nga tamariki ki waho takaro ai. [When the rain stops, the children will go outside to play.]
2. Ina - Ina kite koe i a ia, me mihi. [When you see her, say hello from me.]
3. Kia ... ka - Kia mutu nga whaikorero, ka haere mai te manuwhiri ki te hariru. [When the speeches are over, the guests approach to meet the hosts.]
4. Ana - Hiki ana te hui, hokihoki ana nga tangata ki o ratou kainga.
5. When the meeting closed, eveyone whent home (past)
6. When the meeting closes, everyone goes home (general statement)
7. When the meeting close, everyone will go home (future)
8. Ka ... ana - Ka tae ana te ope, ka powhiritia. [When the party arrives, they will be welcomed.]
9. No to ratou taenga atu ki te marae, ka kite ratou kua timata ke te hui. [When they arrived at the marae, they saw that the meeting had already begun.]