-- adverbs

AdjAdv. Adv ::= A "+ly" ;
AdvPP.  Adv ::= PP ;
PrepNP. PP  ::= Prep NP ;

-- NO AdvCN
--AdvVP.  VP  ::= VP Adv ;
--AdvNP.  NP  ::= NP Adv ;
AdvAP.  AP  ::= AdA AP ;
AdvAdv. Adv ::= AdA Adv ;

-- different from AdvVP!

--VP ::= AdV VP ;

OptAdV ::= | AdV ;