class _aux_verbs 
{
    <: light_categories;
    - shallow_auxiliary;
    Root >> VModTop;
    node VModTop: [cat: VMod, id:vmod, bot: [position: post]]; node(VModTop).top = node(VModTop).bot;
    VModTop >> V1;
    node V1: [cat:V1]; 
    - V1::vagreement_ancestor; V1=V1::V; Root = V1::Ancestor;
    - V1VMod::agreement; V1=V1VMod::N;
    V1 >> VMod; VMod >> Infl;
    node VMod: [cat: VMod, id:vmod, bot: [position: post]]; node(VMod).top = node(VMod).bot;
    %%    - VMod::vagreement; VMod = VMod::V;
    node Infl : [cat: Infl, id:Infl];
    node(Infl).top.inv = node(V1).bot.inv;
    Infl >> Anchor;
    VMod < Foot;
    - aux::vagreement; Anchor = aux::V;
    node(aux).bot.mode = value(~adjective);
    node(Infl).bot.mode = value(~adjective);
    node(Infl).top.mode = value(~adjective);
    node Root : [cat: Infl, adj: no];
    %% We may have an clitic inverted subject on aux
    <: clitic_inverted_subject;
    desc.ht.imp = value(-);
    %% no inverted subject on adjoined sentence
    node(Foot).bot.wh = node(Root).bot.wh;
    node(Foot).bot.inv = node(Infl).bot.inv;
    node(Infl).top = node(Root).bot;
    node(Root).top.mode = value(~participle);
    node(Foot).bot.inv = node(V1).bot.inv;
    node(Foot).bot.inv = node(Root).bot.inv;
%%    node(Anchor).bot.diathesis = node(Foot).top.diathesis;
    <: que_as_advneg; Negated = Foot; Sentence = Root; Arg = Root;
    VModTop < advque;
    desc.dependency = value(aux);
}