The Structure is
助动词be+及物动词的过去分词
(be+P.P.)
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一这般支将钢来笔时已：经s用ha了ll 几/ w年il。l be done ; be going to说当b这句e中家d含o工n有厂e情已态经动开词张时，。句H子e s结a构id为thceafnac/ tmouryst / hhaadvebteoe…nboepednoende . 他
The baby must be looked after well. The这w孩o子rk必w须ill被be好f好ini照sh顾ed。in three hours. 工作将于三小时后完成。
被动语态的结构：
被动语态由“助动词be+及物动词的过去分 词”构成，助动词be有人称、数的变化,其变 化规则与be作为连系动词时一样。 如: The desk is made of wood.
The desks are made of wood.
He is asked a question by the teacher.
The tree was planted by us.
We speak
主语
谓语
English.
宾语
主动语态
English is spoken by us.
主语
谓语
宾语
被动语态
当主语是动作的执行者时，动词用主动语态 （Active Voice）；如果主语是动作的承受者， 动词便用被动语态（Passive Voice）。
（强调书被发现而不是强调由谁发现）
被动语态的用法:
1.强调动作的承受者;
如:Table tennis is played all over China. English is spoken by many people.
2.不需要指出动作的执行者或动作的执 行者难以说出或不必说出.
如:Another bridge has been built across the Changjiang River. The Party was founded on July 6,1924. A note was passed up to the speaker.
I was given a nice present by my friend yesterday.
典型题例
例1 将下列句子改为被动语态。 We clean our classroom every day.
Our classroom is cleaned (by us) every day.
在改写中应注意：
1.把原来的宾语提到前面作被动语态的主语; 2.把动词变成“be + 过去分词”; 3.主动语态中的主语变为介词by的宾语。
主变被解题步骤:
1. 找宾语 ----即动作的承受者
2. 判断宾语的单复数 ----即be动词的单复数. 3. 判断动词的时态 ----即be动词的时态. 4. 修改谓语的时态 ----即原句动词改为过去分词 5. 修改原句的主语 ----即by+ 主语.
They make shoes in that factory.
are Shoes
made by them.
were
Tom broke the window. The window was broken by Tom.
Tom broke the windows.
The windows were broken by Tom. He broke the windows. The windows were broken by him.
What is the Passive Voice?
ive Voice) 被动语态(the Passive Voice)
A. 主动语态表示主语是动作的执行者。
We planted the tree.
B. 被动语态表示主语是动作的承受者。
When to use it?
1. 当我们不知道谁是动作的执行者，或没有必 要指出谁是动作的执行者时。
The dictionary is well kept. 这本词典被保存完好(不需要说明是谁保存的) 。 2. 当我们需要强调动作承受者，而不是动作的 执行者。
These book were found in the 1920s. 这些书是在二十世纪二十年代发现的。
We cleaned the classroom yesterday. 昨天我们打扫了教室。
The classroom was cleaned by us yesterday. 昨天教室被我们打扫了。
Many students study English.(主动语态)
English is studied by many students.(被动语态)
一般现在时的被动语态： am/are/is + 过去分词
1. People play football all over the world.
Football is played all over the world by people .
2. Mr. Green teaches us this term.
We are taught (by Mr. Green) this term.