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In grammar, a subject complement (also called a predicative complement) is a predicative expression that follows a linking verb (copula) and that complements (completes) the subject of the sentence by either (1) renaming it or (2) describing it. In the former case, a renaming noun phrase such as a noun or pronoun is called a predicative nominal. An adjective following the copula and describing the subject is called a predicative adjective. In either case the predicative complement in effect mirrors the subject. Subject complements are used with a small class of verbs called linking verbs or copulas, of which ''be'' is the most common. Since copulas are stative verbs, subject complements are not affected by any action of the verb. Subject complements are typically not clause arguments, nor are they clause adjuncts. ==Examples== The subject complement is bold in the following examples: :: *The lake was a tranquil pool. - Predicative nominal as subject complement Here, ''was'' is a linking verb (an inflected form of ''be'') that equates the predicate nominative phrase ''a tranquil pool'', with the head noun, ''pool'', to the subject, ''the lake'' (with head noun ''lake''). :: *The lake is tranquil. - Predicative adjective as subject complement In this example ''tranquil'' is a predicative adjective linked through the verb ''is'' (another inflected form of ''be'') to the subject ''the lake''.〔(UCalgary )〕 An example in which the subject complement is a dependent clause is: :: *That is what my point is. - Predicative clause as subject complement 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「subject complement」の詳細全文を読む スポンサード リンク
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