内容正文:
Unit 5 What are the shirts made of ?
一般现在时被动语态
主动语态和被动语态
主语是动作的 执行者 ——
主语是动作的 承受者 ——
eg:Many people speak English.
(主动语态, 句子的主语many people是动作speak的执行者)
English is spoken by many people.
(被动语态, 句子的主语English是动作speak的承受者)
被动语态
执行者
承受者
主动语态
被动语态的谓语构成:
助动词be + 及物动词的过去分词
be 有时态、人称和数的变化
The chopsticks are made in China.
The shirt is made of cotton.
否定句
一般疑问句
及回答
特殊疑问句
肯定句
The shirt is not made of cotton.
Is the shirt made of cotton?
Yes, it is . / No, it isn't.
What is the shirt made of ?
一般现在时被动语态
肯定式:
主+is/am/are +及物动词过去分词+其他.
否定式:
主+is/am/are+ not +及物动词过去分词+其他.
一般疑问式:
Is/Am/Are +主+及物动词过去分词+其他?
其他.
特殊疑问式:
特殊疑问词+一般疑问句?
一般疑问式答语
肯:Yes,主+is/am/are.
否:No,主+ is/am/are+not.
被动语态的用法:
当说话者不知道动作的执行者或没必要指出动作的执行者,只需要强调动作的承受者时,可以使用被动语态。
如果需要在被动语态中指出动作的执行者时一般用介词 引出。
Chinese is spoken by the largest number of people in the world.
by
主动语态变被动语态
We speak English.
主语
谓语
宾语
English is spoken by us.
主语
谓语
宾语
主动语态的宾语变为被动语态的主语;主动语态的谓语变为“be+及物动词过去分词”结构,时态不变;主动语态的主语变为介词by的宾语,主格变宾格,放在谓语之后。
主动语态
被动语态
一. 单项选择。
1. Knives_____ of metal(金属) and wood.
A. made B.make C.are made
2.more and more foreigners Chinese in the world now.
A. speak B. are spoken C.spoke
3. The room _____ by me every day.
A. is cleaned B.is clean C.cleans
4. Look! Someone __________.
A. is danced B. is dancing C.dances
5. I'll be very happy if I to his birthday party.
A. invite B. am invited C. will be invited
C
A
A
B
B
二.用括号内所给动词的正确形式填空。(请注意语态)1.Many flowers __________(plant)every year.
2. A large number of trees______________(cut)down every year. 3. The students _____ often _____ (tell) to take care of their desks and chairs. 4. Vegetables, eggs and fruits_________ (sell) in this shop. 5.We must (plant)more trees.
are planted
are cut
are
told
are sold
plant
三.按要求改写句子,每空一词。
1. These cars are made in Shanghai.(变否定句)
These cars m