Focusing on cyclic movement and certain questions connected to it, he investigates the extent to which successive-cyclic movement, partial movement, pied-piping
, secondary movement under pied-piping
, his own 2003 stranding generalization are amenable to a unifying treatment, and if so what role the notion of a phase might play in such a treatment.
Of the two mechanisms generally available in Present-Day English relative clauses whenever a prepositional object is relativised, preposition-stranding is the only possibility in Old English infinitival relatives, pied-piping
not being available until the fourteenth century.
He identifies features of pied-piping
that hold true across different languages, proposes how to account for them, and contends that counter-observations can often be ascribed to independent reasons.