From Bill Keller’s op-ed piece “Falling In and Out of War” in the NYT on 3/19/12:
(1) Policy makers should – and President Obama mostly has – put a premium on appraising alternatives to war.
A real-life example of a phenomenon discussed by Geoff Pullum and me in a 1986 article “Phonological resolution of syntactic feature conflict” (Language 62, on-line here): the verb form put (boldfaced above) serves simultaneously as two different inflectional forms of the lexeme PUT — as the BSE complement of the modal auxiliary should and as the PSP complement of the perfect auxiliary has. For almost all verb lexemes in English, these two forms are distinct (compare PLACE, with BSE place and PSP placed), so that the sort of reduced coordination in the Keller example apparently wouldn’t be possible, since there’s no available form that’s both BSE and PSP. For a fully parallel coordination, the distinct verb forms would have to be supplied:
(2) Policy makers should place – and President Obama mostly has placed – a premium on appraising alternatives to war.
But for about two dozen verb lexemes, of which PUT is one, the BSE and PSP happen to be phonologically identical, so that the conflict between the two feature values can be “phonologically resolved”, and the reduced coordination is (exceptionally) possible.