class _verb 
{
    <: _verb_or_aux;
    node v:[cat:v|adj];    
    - clitics;
    clsubj < post::clseq;
    %% self contained sentence can have almost any mode,
    %% except a non passive-like participle
    %% WARNING: should be refined for gerundive
    v +
        node(Infl).top.mode = value(~participle|gerundive),
        ( desc.extraction = value(adjx),
          node(S).bot.sat = value(+)
          |
          node(S).bot.sat = value(-)
          )
        |
        node(Infl).top.mode = value(participle),
        node(Infl).top.aux_req = value(être),
        node(S).bot.sat = value(-|ppart)
        |
        node(Infl).top.mode = value(gerundive),
        node(S).bot.sat = value(-|ppart)
        ;
    v +
%        node(clseq).hascl = value(~ -),
        node(v).lex = value(a|aura|avait|eu),
        desc.dummy.impsubj = value(~ -),
        desc.dummy.ilya = value(+)
        |
        desc.dummy.ilya = value(-)
        ;
}