grammar, a subjectcomplement is a predicative expression that follows a copula (commonly known as a linking verb), which complements the subject of a clause
non-theoretical grammars, the terms subjectcomplement (also called a predicative of the subject) and object complement are employed to denote the predicative
used to turn a clause into the subject or object of a sentence. For example, the word that may be called a complementizer in English sentences like Mary
agent. Factor I can cleave C3b into C3c and C3d, the latter of which plays a role in enhancing B cell responses. In the alternative complement pathway, C3