Mary took my last piece of candy.Mary不等於my last piece of candy，Take作為連綴動詞（後接補語？）可否再舉述，謝謝?

Subject+be+cpomplement
eg:-
Last piece of candy(s)
is(v)
what Mary took(Complement)
noun+complement
eg:-
Mary(s)
took(v)
the candy (needed to make something complete that makes perfect)
that is my last piece(complement)