第九章 被动语态与过去分词
核心主旨
本章聚焦被动语态的构成、句型转换及简化诠释,明确“be + 过去分词”的核心结构,同时区分过去分词作形容词与被动语态的差异,强调被动语态的使用需“师出有名”(提升修辞效果),避免滥用,关键通过“be 为动词、过去分词为形容词补语”的简化视角理解复杂被动结构。
一、被动语态的核心定义与构成
-
定义:被动语态(Passive Voice)表示主语“被”如何,核心结构为“be 动词 + 过去分词(be + Ven)”,需由主动句改写而来(主动句需有宾语,无宾语的不及物动词无被动语态)。
-
核心逻辑:主动句的宾语变被动句的主语,主动句的主语可由“by + 宾语”补充(表“被谁”),也可省略(无需强调动作执行者)。
二、不同句型的被动改写
(一)可改写为被动的句型(主动句需有宾语)
-
S + V + O(主+谓+宾):直接将宾语变主语,动词改为“be + 过去分词”。
-
主动:The author wrote the book in 2003.
-
被动:The book was written (by the author) in 2003.
-
-
S + V + O1 + O2(双宾语):两个宾语均可变主语,形成两种被动结构。
-
主动:He showed the guard his pass.
-
被动 1(O1 变主语):The guard was shown his pass.
-
被动 2(O2 变主语):His pass was shown to the guard.(或 His pass was shown the guard.)
-
-
S + V + O + C(宾补句型):宾语变主语,宾补保留原位,动词改为“be + 过去分词”。
-
主动:All his friends call him Lucky.
-
被动:He is called Lucky by all his friends.
-
-
介词的宾语:介词宾语变主语,动词改为“be + 过去分词”,介词保留。
-
主动:Somebody sat on my hat.
-
被动:My hat was sat on.
-
三、被动语态的简化诠释(核心技巧)
-
简化逻辑:将 be 动词视为唯一动词(负责时态),后面的过去分词视为“形容词补语”(表“被…/已…”),无需记忆复杂的被动时态名称(如“现在进行被动”“现在完成被动”)。
-
示例:
-
现在进行被动:A bridge is being built. → be 动词(is,现在简单式)+ 形容词补语(being built:being 表“正在”,built 表“被盖”)。
-
现在完成被动:Your application has been approved. → be 动词(has been,现在完成式)+ 形容词补语(approved:被核准)。
-
四、过去分词(Ven)的双重身份
(一)作形容词(最常用)
-
位置:名词短语中(前置)或补语位置(后置),表“被…/已…”。
-
名词短语中:boiled water(开水,已煮过的水)、a broken cup(破碎的杯子,被打破的)。
-
补语位置:The door is closed.(门是关着的,已关闭)、He is interested in music.(他对音乐感兴趣,表状态)。
-
-
关键:可被副词 very 修饰(Only 形容词可被 very 修饰),如 I am very annoyed with him.(annoyed 为形容词)。
五、被动语态的使用场景(“师出有名”)
被动语态并非主动语态的简单替换,需满足以下条件:
-
避免模糊主语(如 somebody、people):Somebody stole my wallet. → My wallet was stolen.
-
强调动作承受者(主语):The letter was sent by express.(强调信件被快递寄出)。
-
保持句子连贯(前后主语一致):Although the doctor ordered him not to smoke, he was told to quit.(避免主语切换)。
-
正式文体(如学术、新闻):The new policy has been implemented.