主语补足语

含有复合宾语的句子，当采用被动语态时，原来的宾语变成主语，原来的宾语补足语则因此变为主语补足语。试对比下面句子。

* We call him Jason. (名词作宾语补足语) 我们叫他贾森。
* He is called Jason. (名词作主语补足语）他叫贾森。

* We must keep these products dry. (形容词作宾语补足语) 我们必顺保持产品干燥。
* These products must be kept dry. （形容词作主语补足语）这些产品必顺保持干燥。

* He turned the light off. (副词作宾语补足语) 他关掉了灯。
* The light was turned off. (副词作主语补足语) 灯关了。

* I saw him playing basketball yesterday. （现在分词作宾语补足语）我昨天看见他正在打蓝球。
* He was seen playing basketball yesterday. （现在分词作主语补足语）昨天看见他正在打蓝球。

* He instructed us to wait here. （不定式作宾语补足语）他指示我们在这儿等。
* We are instructed to wait here. （不定式作主语补足语）我们得到指示在这儿等。

* We should keep the cards in good order. （介词短语作宾语补足语）我们应该保持卡片排好序。
* The cards should be kept in good order. （介词短语作主语补足语）卡片必顺排好序。