concrete QuestionTam of Question = CatTam ** open
  Prelude, ResTam, ParadigmsTam, (VS=VerbTam), (NM=NounTam), (SS=StructuralTam) in {

-- A question can be formed from a clause ('yes-no question') or
-- with an interrogative.

-- Interrogative pronouns can be formed with interrogative
-- determiners, with or without a noun.
--lin
--  -- : IDet -> CN -> IP ;       -- which five songs
--  IdetCN idet cn = NM.DetCN idet cn ** {
--    sp = \\nf => idet.sp ! nf ++ cn.s ! nf
--  } ;

--  -- : IDet       -> IP ;       -- which five
--  IdetIP idet = NM.DetNP idet ** {sp = idet.sp};

--  -- : IQuant -> Num -> IDet ;  -- which (five)
--  IdetQuant iquant num = iquant ** {
--    pr = num.s ++ case iquant.isPre of {True => iquant.s ; False => [] } ;
--    -- if isPre is True, then: "berapa kucing"
--    s = case iquant.isPre of { False => iquant.s ; True => [] };
--    -- if isPre is False, use s: "kucing berapa"
--    n = num.n ;
--    count = "" ;
--  } ;

--  -- : IP -> ClSlash -> QCl ; -- whom does John love
--  QuestSlash ip cls = cls ** {
--    pred = \\vf,pol => cls.pred ! vf ! pol ++ ip.s ! Bare
--  } ;

--  -- : Subj -> Pred -> QCl ;
--  -- QuestCl cl = cl ** {
--  --   pred = \\vf,pol => cl.pred ! vf ! pol
--  -- };
--  QuestCl cl = cl ** {
--    subj = "adakah" ++ cl.subj;
--  } ;

--    -- missing record fields: pred type of vp

--  -- : IP -> VP -> QCl ;
--  --  expected: ParamTam.VForm => ParamX.Polarity => Str
--  --   inferred: {s : ParamTam.VForm => ParamX.Polarity => Str}

--  QuestVP ip cl =  cl ** {
--    pred = \\vf,pol => cl.s ! vf ! pol;
--    subj = ip.s ! Bare ;
--  };

--  -- : IAdv -> Cl -> QCl ;    -- why does John walk
--  QuestIAdv iadv cls = {
--    subj = case iadv.isPre of {
--      True => iadv.s ++ cls.subj ; False => cls.subj
--    } ;
--    pred = \\vf,pol => case iadv.isPre of {
--      True => cls.pred ! iadv.vf ! pol ;
--      False => cls.pred ! iadv.vf ! pol ++ iadv.s
--    } ;
--  } ;

--  -- : IP -> IComp ;
--  CompIP ip = {s = ip.s ! Bare } ;    -- who (is it)

--  -- : IComp -> NP -> QCl ;   -- where is John?
--  QuestIComp icomp np = {
--    pred = \\vf,pol => np.s ! Bare ;
--    subj = icomp.s ;
--  } ;

-- \\vf,pol,posadv =>
--  --   {
--  --   pred = \\vf,pol => ip.s ++ vp.s ! vf ! pol;
--  -- } ;

--{- ----
--      s = \\t,a,p =>
--            let
--              cl = oldClause slash ;
--              cls : Direct -> Str =
--                    \d -> cl.s !        d ! t ! a ! p ! Indic ;
----                \d -> cl.s ! ip.a ! d ! t ! a ! p ! Indic ;
--              who = slash.c2.s ++ ip.s ! slash.c2.c
--            in table {
--              QDir   => who ++ cls DInv ;
--              QIndir => who ++ cls DDir
--              }
---}

--{-
--  lin





--  -- : IComp -> NP -> QCl ;   -- where is John?
--  QuestIComp icomp np =


-- Interrogative pronouns can be formed with interrogative
-- determiners, with or without a noun.

--  -- : IDet -> CN -> IP ;       -- which five songs
--  IdetCN idet cn = {contractSTM = False} ** NS.DetCN idet cn ;

--  -- : IDet       -> IP ;       -- which five
--  IdetIP idet = {contractSTM = False} ** NS.DetNP idet ;

-- They can be modified with adverbs.
--  -- : IP -> Adv -> IP ;        -- who in Paris
--  --AdvIP = NS.AdvNP ;

-- Interrogative quantifiers have number forms and can take number modifiers.

--  -- : IQuant -> Num -> IDet ;  -- which (five)
--  IdetQuant = NS.DetQuant ;

-- Interrogative adverbs can be formed prepositionally.
--  -- : Prep -> IP -> IAdv ;     -- with whom
--  PrepIP prep ip = SS.prepIP prep (ip.s ! Abs) False ;

-- They can be modified with other adverbs.

--  -- : IAdv -> Adv -> IAdv ;    -- where in Paris
--  --  AdvIAdv iadv adv =

-- Interrogative complements to copulas can be both adverbs and
-- pronouns.

--  -- : IAdv -> IComp ;
--  CompIAdv iadv = iadv ;            -- where (is it)


-- More $IP$, $IDet$, and $IAdv$ are defined in $Structural$.

-- Wh questions with two or more question words require a new, special category.

--  cat
--    QVP ;          -- buy what where
--  fun
--    ComplSlashIP  : VPSlash -> IP -> QVP ;   -- buys what
--    AdvQVP        : VP  ->   IAdv -> QVP ;   -- lives where
--    AddAdvQVP     : QVP ->   IAdv -> QVP ;   -- buys what where

--    QuestQVP      : IP -> QVP -> QCl ;       -- who buys what where
---}


--}
}