It has been hypothesized that separable complex verbs (SCVs, for example, ópzoeken 'look up') and inseparable complex verbs (ICVs, for example, doorzóeken 'search') form part of the same historical development, SCVs representing a stage intermediate to constructions with syntactic resultatives and ICVs. This paper shows that such a hypothesis is untenable, since many SCV preverbs and ICV preverbs are nonpredicative and thus semantically different from resultatives. Instead, it is claimed that predicative preverbs and nonpredicative preverbs result from two independent historical developments. In addition, the particular semantic and structural properties of SCVs are assumed to suggest a specific SCV structure, to be positioned in between syntactic phrases and morphologically complex words. *