In Russian, special partitive case or sub-case is observed for some uncountable nouns which in some contexts have preferred alternative form on -у/ю instead of standard genitive on -а/я: выпил чаю ('drank some tea'), but сорта чая ('sorts of tea').
In Russian, special partitive case or sub-case is observed for some uncountable nouns which in some contexts have preferred alternative form on -у/ю instead of standard genitive on -а/я: выпил чаю ('drank some tea'), but сорта чая ('sorts of tea')