A subject complement that is a noun is also called a predicate noun or predicate nominative. e.g.:

　　My neighbor is the president of the PTA.

4. Learning about the past participle as the object complement

如果补语与宾语具有逻辑上的动宾关系, 宾补的动作具有"完成"概念,或宾补表示已经存在的状态,就用过去分词作宾补。常见的用过去分词作宾补的结构有:

　　keep / leave / have / get sth. done; find / see / discover / observe / notice / hear sth. done; make oneself done

　　e.g.: I have never heard the song sung in English.

　　Note:如果把上述结构变为被动语态, 则原来作宾补的过去分词变成主补。

　　e.g.: 1. The window was found broken.

　　　　2. The work was left unfinished.

The Past Participle Used as Object Complement 1. 表感知的动词： feel， see， hear， watch， smell， taste， notice， observe， find等。 I heard the song sung in our school．

Can you smell the food burnt？

On my way back home, I heard my name called．