It was noted below that this is properly called the partitive case; the Wikipedia articles have good examples in the vein of "А не испить ли нам чаю":[1][2] [1

It was noted below that this is properly called the partitive case; the Wikipedia articles have good examples in the vein of "А не испить ли нам чаю":[1][2] [1]https://en.wikipedia.org/wiki/Partitive_case#Russian https://en.wikipedia.org/wiki/Partitive_case#Russian [2]https://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D1%80%D1%82%D0%B8%D1%82%D0%B8%D0%B2 https://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D1%80%D1%82%D0%B8...