人教版 被动语态专项复习 课件.pptVIP

* * 被动语态专项复习 一、主动语态和被动语态 英语动词有两种语态，即主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者. 例如： Many people speak English. English is spoken by many people. 二 被动语态的构成： 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、数和时态的变化，其变化规则与 be 作为连系动词时完全一样。 一般现在时被动语态的构成： am/is/are+及物动词的过去分词 一般过去时被动语态的构成： was/were+及物动词的过去分词 含情态动词的被动语态构成： 情态动词（can/may/must/should）+be+及物动词过去分词 三 被动语态的用法： 当我们不知道谁是动作的执行者，或者没有必要指出谁是动作的执行者时，或者只需要强调动作的承受者时，要用被动语态。 1. The jacket is made of cotton. 2. English is spoken in Canada. 四 我们该如何变被动语态呢？ 1 动作承受者+be +过去分词+（by + 动作执行者）+其余部分 2 根据实际情况变化一下 be . （根据被动语态的构成） （目的是为了保持时态和形式与原句一致。） 在学习中及时总结和归纳知识是十分重要的，我们不能满足于用一把钥匙开一把锁，而要用一把钥匙开一类锁。 被动语态结构 be +过去分词 +by 行为发出者 主动语态 He cleans the room . 被动语态 The room is cleaned by him. 否定句 The room isn’t cleaned by him. 疑问句 Is the room cleaned by him? 练习 主动变被动 1.They use a recorder in class. 2.He writes some letters to his classmate. 3.The workers built our new building a month ago. 4.The boy turned on a light when he left. A recorder is used by them in class. Some letters are written by him to his classmate. Our new building was built by the workers a month ago. A light was turned on by the boy when he left. 1.Chinese people built the Great Wall 2,000 years ago. 2. We must plant more trees next year. 3.Dalian produces big ships. 4.Farmers harvest rice in autumn . 5.We should clean our classroom every day. The Great Wall was built by Chinese people 2000 years ago. More trees must be planted next year. Big ships are produced in Dalian. Rice is harvested in autumn. Our classroom should be cleaned every day. 被动变主动 1. Food or drink should not be taken into the concert. 2. Can rice be grown in water? 3. His homework isn’t handed in every day. 4. Was the classroom cleaned yesterday? You shouldn’t take food or drink into the concert. Can people grow