2015九年级英语课件：Unit 3 被动语态.ppt

* 1.Teenagers should be allowed to choose their own clothes. 2.English is spoken by many people . 4.Lucky 52 is watched on TV by many people . 3.The tickets about heroes are sold out . 5.Rice is planted in South China. 6.He is said a good boy . 语态：表示主语和谓语动词之间的关系。 英语有两种语态，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。 如： Many students study English.(主动语态) English is studied by many students. (被动语态) 语态 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. 被动语态的结构 助动词be+及物动词的过去分词 不同的时态有不同的被动语态结构 1.一般现在时的被动语态结构： by many students. 1.Many students study English. English is studied 2.They make shoes in that factory. Shoes are made by them in that factory. 1.把主动语态的宾语变为被动语态的主语。 2.把主动语态的谓语变为被动语态的谓语。 3.把主动语态的主语变为被动语态的by 短语。（① by短语可以省。② by短语 后跟代词的宾格。） by the teacher. 3.The teacher often asks him questions. He is asked questions 1. 找宾语 ----即动作的承受者 They make shoes in that factory. Shoes 2. 判断宾语的单复数 ----即be动词的单复数. are made 3. 判断动词的时态 ----即be动词的时态. 4. 修改谓语的形式 ----即原句动词改为过去分词 5. 修改原句的主语 ----即by+ 宾语（原主语）. by them. 主变被解题步骤 主变宾,宾变主, 谓动be done 时不变,人称、数、格随着变 They play football on Sunday. Lucy does the homework in the evening. They often use computers in class. We make these machines in Beijing. Football is played by them on Sunday. The homework is done by Lucy in the evening. Computers are often used by them in class. These machines are made in Beijing. Practice 肯定句：主语＋be + 过去分词＋(by ~) 否定句：主语＋be not ＋过去分词＋(by ~) 一般疑问句：Be ＋主语＋过去分词＋(by ~)? 特殊疑问句： 疑问词＋be＋主语＋过去分词＋ (by ~) by many students. English is studied by many students. English is not studied 句式 Is English studied by many students? Who is English studied by? The homework is done by Lucy in the evening. Computers are often used by them in class. These machines are made in Beijing. Football is