In a group of genetically unrelated and otherwise fully regular head- initi
al SVO languages a particular modal verb is consistently found to occur in
predicate-final position, posing a strong empirical challenge to the Univer
sal Base Hypothesis argued for in Cinque (1999). Detailed investigation ind
icates that the surface forms are however derived from fully regular underl
ying structures via a process of focus- driven light predicate raising. Cro
ss-linguistic variation in the paradigm then shows that the basic modal str
ucture is currently in different stages of development in the languages inv
estigated. In Cantonese in particular it is argued that the trigger for VP-
raising has now become fully fossilized and no longer reflects its original
motivation. The paper concludes that certain movement operations may in ge
neral occur without any clearly understandable synchronic trigger. Formally
, Chomsky's 'strong categorial/EPP features' are suggested to correspond pr
ecisely to this type of movement whose original motivation has weakened and
become hidden during the course of language change.