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)