被动语态<?xml:namespace prefix="o" ns="urn:schemas-microsoft-com:office:office"></?xml:namespace>
当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。
改为被动语态
His brother washes bowls every day.
主 谓 宾（受动者）
Bowls are washed by his brother every day.
