Partitive Genitive

In standard Serbian grammar, the overarching category is деони (партитивни) генитив (partitive genitive). Describing an action as having делимичан обухват (partial scope or partial affectedness) captures its specific semantic contrast with the accusative: the genitive marks an indefinite quantity or an unspecified slice of a whole, whereas the accusative marks full affectedness (потпун обухват) or a specific, bounded item. While the partitive genitive frequently co-occurs with overt quantifiers and measure words (such as број + мера + генитив or генитив после много; мало; неколико), standard grammar recognizes its bare, quantifier-free usage across distinct syntactic positions:

1. Direct Object (Прави објекат)
With transitive verbs of consuming, acquiring, or dispensing (such as попити, појести, купити, донети, сипати), a bare partitive genitive indicates a partial, indefinite amount:

• Сипај ми воде. (Pour me some water.)
• Узми хлеба. (Take some bread.)
• Накупио сам књига. (I acquired a pile of books — typical with cumulative verbs prefixed with на-).

2. Oblique Object with Verbs of Satiety (Неправи објекат)
Intransitive reflexive verbs of satiety and saturation (typically prefixed with на- ... се, such as најести се, напити се, нагледати се) govern an oblique complement in the partitive genitive, indicating the source of satiety:

• Најели смо се колача. (We ate our fill of cakes.)
• Напиј се хладне воде. (Drink your fill of cold water.)

3. Logical Subject with Existential Verbs (Логички субјекат)
In affirmative existential constructions denoting presence, availability, or remaining, the logical subject appears in the partitive genitive to express an indefinite quantity or portion:

• Има ли хлеба? (Is there any bread?)
• Има воде у чаши. (There is some water in the glass.)
• Остало је колача. (There are some cakes left.)

Important distinction: While affirmative има governs a partitive genitive of partial scope, its negative counterpart нема denotes total absence or non-existence (zero quantity) rather than a partial amount. Syntactically, Нема хлеба (There is no bread) functions as an existential genitive of negation; see генитив под негацијом for complete rules.

Note also the suppletive forms of existential има / нема: in the past and future tenses, Serbian does not use *имало је. Instead, existential constructions supplete to impersonal forms of бити with neuter singular agreement: past било је хлеба / није било хлеба, future биће хлеба / неће бити хлеба.

Key Syntactic Diagnostics and Constraints:
• Verbal Aspect Constraint: A bare direct object in the partitive genitive typically requires the perfective aspect. Perfective verbs delimit a single completed event involving a bounded portion (e.g., perfective Попиј воде 'Drink some water' vs. imperfective Пиј воду 'Drink [the] water'). Imperfective verbs designate an ongoing or repeated process, which canonically rejects the bare partitive genitive and selects the accusative.
• Accusative Alternation: A direct object partitive genitive alternates readily with the accusative of total scope (Попио сам воде [some water, partial scope] vs. Попио сам воду [the water, full scope]). In contrast, the oblique genitive governed by на- ... се verbs cannot alternate with an accusative direct object (*Најео сам се колаче is ungrammatical), showing it is a verb-governed oblique complement.
• Mass vs. Countable Nouns: Mass nouns take the genitive singular (сира, шећера, воде), as do divisible countable foods conceived in portions (узми пите / торте). Countable individuals take the genitive plural (купити јабука 'buy some apples', contrasting with accusative plural купити јабуке 'buy the apples').
• Standard Endings: Contemporary standard Serbian exclusively uses the standard genitive singular endings (masculine/neuter -а: сира, чаја, меда). The historical masculine partitive ending in -у (сиру, меду) is archaic or dialectal.