COSYtools / Case Systems

Interactive Case System Reference

Explore noun declension matrices for Russian (6 cases) and Modern Greek (4 cases). Click any case row or cell for full grammatical breakdowns and examples.

Case Name Key Question Masculine Endings Feminine Endings Neuter Endings

Click any row above to view full case rule breakdown

Select a case from the table to see usage triggers, prepositions, and sample sentences.

Example sentences will appear here...

⚡ Practice Case Drills on COSYgames