ATEG folks:
 
My students are I are puzzling over analysis of a sentence
somewhat like this (I simplify it slightly):
 
        She was supposed to be elated.
 
(1)  How would you analyze that sentence?
 
        (Cf.  She had to be elated)
 
        We consider _elated_ a subjective complement.  But if
        _had to_ is a "semi-auxiliary" (a term learned from
        Kolln's Understanding English Grammar), is _supposed to_
        a semi-auxiliary, as well?
 
(2)  Can you refer us to any additional discussions in print of
semi-auxiliaries, or of _to BE supposed (to)_?
 
Thanks!
 
Carolyn Kirkpatrick
York College/CUNY