started a subdir for the book

book/examples/chapter6/VerbsEng.gf

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+concrete VerbsEng of Verbs = {
+
+lincat
+  S, NP, Subcat, V = Str ; Args = Str * Str ;
+
+lin
+  cIntr = [] ;
+  cTr   = [] ;
+  cS    = [] ;
+
+  aIntr su    = <su,[]> ;
+  aTr   su ob = <su,ob> ;
+  aS    su s  = <su,"that" ++ s> ;
+
+  pred _ v xs = xs.p1 ++ v ++ xs.p2 ;
+
+  john = "John" ; mary = "Mary" ;
+  walk = "walks" ;
+  love = "loves" ;
+  know = "knows" ;
+
+}