被动语态是指主语是动作的承受者，不是执行者。被动语态的构成：
be动词（am, is, are, was, were等）+过去分词。

例如：

- 主动语态：Tom kicked the ball. （汤姆踢了球。）
- 被动语态：The ball was kicked by Tom. （球被汤姆踢了。）

被动语态常用于以下情况：

-


强调动作承受者而不是执行者。
- 表示不知道或不关心动作执行者是谁。
- 避免重复使用主语。

以下是一些例句：

- Active: The doctor prescribed some medicine.
Passive: Some medicine was prescribed by the doctor. （医生开了些药。）
- Active: The storm destroyed the house.
Passive: The house was destroyed by the


storm. （暴风雨摧毁了房子。）
- Active: They appointed her as the manager.
Passive: She was appointed as the manager. （他们任命她为经理。）