Board Thread:Linguistics/@comment-25410520-20150118055513

I've always used Nominative-Accusative because it's the only one I understand. Can someone please explain what is an Ergative-Absolutive, and maybe Tripartite. I want to know for general knowledge and so I can incorporate it into my newest langauge Polynesian Language Maxseptillion77 (didn't think of a name). Thank you in advanced. 