Verbs of perception may in Croatian Church Slavonic have nominal and prepositional phrases, as well as different clausal structures, as complements. In this paper the author describes types and structure of clausal complements. Finite complements may be either declarative, interrogative or relative clauses. Declarative clauses are most often introduced by the complementizer eko [jako], and less frequently by complementizers da and kako. The complementizer kako does not belong to Church Slavonic, but only to Croatian, while the complementizer da in Croatian Church Slavonic occurs only with verbs of mental perception. Interrogative complements may be either yes-no questions, introduced by the complementizer li, by the group eda [jeda] kako, as well as by the hypothetical complementizers ace [asce] and ako, or pronominal questions. The verbs slisati, smotriti and videti may also have relative clauses without an antecedent as complements. Different kinds of secondary predications can also occur as complements of perception verbs in Croatian Church Slavonic. Most often, they consists of an NP and a participle which agrees with it in gender, number and case. Extremely rare examples of secondary predications consisting of an NP and a non-agreeing form of the participle can be attributed to the influence of vernacular Croatian. Secondary predications may also consist of an NP and an agreeing adjective. It is shown that secondary predications are not full sentences, belonging to the categories CP or TP. It is most likely that they are projections of the category AspP. Rarely, under Greek and Latin influence, perception verbs in Croatian Church Slavonic may take infinitival clauses as complements. In active sentences these are always accusatives with infinitives, and in passive sentences nominatives with infinitives. There are no infinitival complements with an implicit external argument, which are possible in modern Croatian and Slovenian. Infinitival complements are also not full sentences, but most probably, like participial constructions, projections of the category AspP. As in modern South Slavic languages, an accusative noun phrase followed by a finite clause may also occur as a complement of verbs of perception. Part of these examples are NPs followed by relative clauses introduced by the relative pronoun ize. However, especially interesting are the cases in which the clause which follows the accusative NP is not introduced by ize, but by the complementizer eko. These complements have several interesting characteristics: 1. the subject of the eko-clause must be coreferential with the preceding accusative NP, 2. the eke-clause is always in the present tense, 3. the event described in the eko-clause must be contemporaneous with the event described in the main clause, 4. the subject of the eko-clause is empty and 5. the accusative NP behaves as a direct object of the perception verb. Such complements express categorical predication in which one participant is singled out of the perceived event, and the event, which is expressed by a finite clause, is predicated of that participant.
