subject complement英[ˈsʌbdʒikt ˈkɔmplimənt]美[ˈsʌbdʒekt ˈkɑmpləmənt]n.主语补足语;[例句]What are traditionally called subject complement and object complement is actually predicate complement.非完整及物动词和非完整不及物动词都需要补语，而传统语法所说的宾语补语和主语补语实际上都是谓语补语。