It seems to me you are dealing with different things when you are looking
at question-order or "there"-expletic overder and passive transformations.
.  In "The winners were annolunce,"winners"  seems to be a true
subject, even though they are being acted upon.  The actors here are
unknown or unimportant.  That's the best reason for using the passive
voice.  And the verb is a true verb.
 
Here is one modification you could make.  You could use a squiggly
vertical line rather than a straight one to intersect the subject-verb
line.  We use squiggly lines rather than straight ones to set off direct
objedcts in passive transformations of S-V-IO-DO sentences -- "He was
given a prize" and we use squiggly lines to set off object complements in
passive transformations ("He was considered a genius") to indicate that
they are not subject complements.  (Emery didn't do this last in his
Sentence Analysis, but he should have.)
 
I'm with Larry Beason:  Reed-Kellogg diagrams have many uses.  Phrase tree
structures may be better ways of showing how the mind composes sentences.
But when you are trying to analyze sentences already composed, diagramming
can clarify things very effectively for people who learn visually.
 
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                Michael Kischner
                North Seattle Community College
                9600 College Way North
                Seattle, WA 98103
 
                (206) 528-4540    FAX (206) 527 3784
                email [log in to unmask]
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learn visually.