predicative of the subject) and object complement are employed to denote the predicativeexpressions (predicative complements), such as predicative adjectives
can be used with any predicativeexpression and not only a predicate nominative, such as in "ὅπου εἰμὶ ἐγὼ καὶ ὑμεῖς ἦτε" ("where I am, you also may be")
In traditional grammar, a subject complement is a predicativeexpression that follows a copula (commonly known as a linking verb), which complements the
kids are happy", wherein happy is a predicate adjective (see also: Predicativeexpression, Subject complement); or as an appositive adjective within a noun