Verbal noun with genitive complement

Formation and Aspect
Verbal nouns are neuter nouns that decline like stavení. They are formed by taking the stem of the passive participle and adding the suffix -í (resulting in the suffixes -ní or -tí), though even intransitive verbs (which lack true passive participles) can form them (e.g., spát → spaní). This often triggers consonant mutations (e.g., platit → placení) or vowel changes (e.g., pít → pití). Crucially, they retain the aspect of the underlying verb (e.g., čtení = the ongoing process of reading; přečtení = the completed act of reading).

Negation
Verbal nouns can be easily negated by attaching the prefix ne- as a single word (e.g., nedělání, neplacení).

Reflexive Pronouns and Lexical Nouns
Verbal nouns retain the reflexive pronoun se/si primarily for disambiguation when a verb has both reflexive and non-reflexive forms with different meanings (e.g., učit 'to teach' → učení 'teaching' vs. učit se 'to learn' → učení se 'learning'). Strictly reflexive verbs (reflexiva tantum) or contexts where no confusion can arise usually drop the pronoun entirely (e.g., chovat se → chování). However, if the noun describes an ongoing process with complements, se is often retained to sound natural (e.g., dívání se na televizi). Furthermore, note that for many common verbs, dedicated lexical nouns are overwhelmingly preferred over the -ní/-tí forms in everyday Czech (e.g., smích 'laughter' instead of smání, pláč 'crying' instead of plakání).

The Genitive Complement
When a verb that normally takes an accusative object is nominalized, that object must be demoted to the genitive case (objective genitive).

• kontrolovat dokumenty (accusative) → kontrolování dokumentů (genitive)

Similarly, the subject of an intransitive verb—or the subject of a transitive verb if the direct object is omitted—can become a genitive complement (subjective genitive), e.g., štěkání psa (the barking of the dog) or čtení studenta (the reading of the student).

Structural Ambiguity
Because both subjects and accusative objects become genitive complements, this can create structural ambiguity. For example, hodnocení učitele could mean 'the evaluation of the teacher' (objective genitive) or 'the evaluation by the teacher' (subjective genitive). While context can sometimes disambiguate, Czech actively resolves this ambiguity by demoting the agent (the subject) to the instrumental case when the genitive slot is occupied by the object. For example, hodnocení učitele ředitelem (the evaluation of the teacher by the principal) or zastřelení medvěda lovcem (the shooting of the bear by the hunter).

Register and Everyday Usage
While heavy genitive chaining is heavily skewed toward formal, academic, and administrative registers (úřední čeština), verbal nouns themselves are extremely common in everyday, informal Czech. They are frequently used to express purpose with prepositions like k (+ dative) or na (+ accusative), such as voda k pití (water for drinking), věci na praní (laundry), or prášky na spaní (sleeping pills). They are also widely used with při (+ locative) to express simultaneous action (e.g., při čtení = while reading). In formal texts, they allow writers to condense clauses into heavy noun phrases, often after prepositions like za účelem or po. If the original subject (the agent) needs to be expressed alongside an object, it is demoted to the instrumental case (e.g., schválení zákona prezidentem).

Important Exceptions
Only underlying accusative objects and nominative subjects convert to the genitive. If the verb governs the dative, instrumental, or a preposition, the verbal noun retains that exact frame (e.g., dative: pomáhání lidem; instrumental: pohrdání nebezpečím; prepositional: čekání na vlak). Verbs that inherently govern the genitive case (e.g., dosáhnout úspěchu) also retain their original frame, meaning the resulting case is still genitive, but it does not 'convert'. Furthermore, because verbal nouns are strictly nouns, they must be modified by adjectives, not adverbs (e.g., rychlé čtení, not rychle čtení).