Partitive is the eleventh (assuming read left to right) skill in the language tree for Russian. In this skill, containing one lesson, you will learn about another use of the genitive: When you can't exactly have one of something, but you can have some!
- чая = of tea
- пиво = beer
- стакан = glass
- миска = bowl
Duolingo Lesson: www.duolingo.com/skill/ru/Partitive