在英语中，有时某些实意动词可兼作系动词，在句中具有既表行为又表状态的双重作用。这种有双重作用的谓语称之为双重谓语（Double Predicate）。双重谓语有其自身的特点，与系表谓语有所区别。
双重谓语的基本形式是：行为动词+表语（说明主语从事该行为时所处的状态），用作双重谓语的动词多为那些表示位置移动变化的行为动词。如：return，leave， go，come，arrive，start等。其具体的结构形式主要有以下几种：
1．动词+形容词 （1）He left this morning very gay．（=He was very gay when he left this morning．）上午离开时，他很开心。 （2）She lay there motionless．（=She was motionless when she lay there．）她躺在那儿一动不动。 2．动词+名词 （1）She left a shy girl and returned a young mother．（=She was a shy girl when she left and a young mother when she returned．）她离开时还是一个害羞的女孩，回来时却是一位年轻的母亲。 （2）He lived a hero and died a martyr．（=He was a hero when he lived and a martyr when he died．）他生前是英雄，死后为烈士。 3．动词+介词短语 （1）He died in despair．（=He was in despair when he died．）他死时非常绝望。 （2）He left in tears．（=He was in tears when he left．）他离开时眼含泪水。 （3）He ran into the room out of breath．（=He was out of breath when he ran into the room．）他冲进房间时已是上气不接下气。 4．动词+分词（短语） （1）They lay there chatting．（=They were chatting when they lay there．）他们躺在那里聊天。 （2）He wandered wondering．（=He was wondering when he wandered．）漫步时，他在冥思。 （3）He came home exhausted．（=He was exhausted when he came home．）他回家时已是筋疲力尽。 5．动词+what从句 （1）He returned home what he had always been．（= He was what he had always been when he returned home．）回家时，他还是老样子。 双重谓语结构很少有否定形式，但偶尔也出现否定形式。这时，要特别注意否定的形式在前，意义在后，即否定后移现象。如： （1）She didn't arrive accompanied by her daughter．（=She was not accompanied by her daughter when she arrived．）她抵达时不是由她的女儿陪同。 （2）He didn't pass noticed．（=When he passed he was not noticed．）他路过时没人注意。
参考资料：http://baike.baidu.com/view/3078917.htm
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