新人教版英语九年《Unit 3 Teenagers should be allowed to choose their own clothes》ppt课件精选.pptVIP

Unit3 Teenagers should be allowed to their own clothes choose * Teenagers 13 - 19 eleven-year-olds: twelve-year-olds: thirteen-year-olds … nineteen-year-olds * 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 * 被动语态的结构 助动词be+过去分词 (be + done) 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. * by many students. 1.Many students study English. English is studied 2.They play basketball. Basketball is played by them is/are+过去分词 * They bought a computer yesterday by them yesterday was/were +过去分词 last year. We planted many trees last year. Many trees were planted A computer was bought * 1.规则动词的过去分词： 1)一般情况在动词原形后加-ed watch---watched 2)以不发音e结尾的加-d practice---practiced 3)以辅音加y结尾的，去y变i加-ed study---studied 4)以重读闭音节结尾，末尾只有一个辅音字母， 先双写该辅音字母，再加-ed stop---stopped 2.不规则动词的过去分词： am is are been have has had do done write written go gone 被动语态： be + 动词的过去分词 含情态动词的被动语态： can\ may\ must\ should + be + 动词的过去分词 The flowers should be watered every day. Cars mustnt be parked here. The work can be finished in two days. * The trees may ____________(plant) in spring. Teenagers should not___________ (allow) to drive. English ___________(speak) in Canada. Math must ___________ (study) well. be planted be allowed is spoken be studied * Students _____ ____ ____ ______ __ take mobile phones to school. Do you agree? Or disagree? 学生不应该被允许 带手机来学校。 should not allowed to be * _______________ should be allowed to do homework with friends. 15岁的人应该被允许和朋友一起做作业。 Fifteen-year-olds * 3. Students should not be allowed to go out at night. * 4. Students should not be allowed to have part-time job. * 改被动语态 They should allow us to have part-time jobs. We should