Published online by Cambridge University Press: 05 December 2008
Standard movement theory stipulates that any X"-phrase that is moved must move to the specifier position (SPEC) of C". In this paper, however, it is argued on the basis of coordination phenomena, verb-final structure, and diachronic evidence that, in relative clauses and indirect questions, the moved pronoun or w-element functions more as a true complementizer than as a fronted X"-phrase and thus should move to the head position C. Movement to C is thus determined not by the phrase-structure level of the moved category, but by feature compatibility.