9年级人教版全一册 Unit 6 When was it invented? 教案(表格式）

学科 英语 年级/册 九年级 教材版本 人教版
课题名称 Unit 6 When was it invented
难点名称 能正确使用一般过去时的被动语态，能简要谈论发明的历史。
难点分析 从知识角度分析为什么难 知识点本身内容复杂:be动词的各种形式及组合是难点，一般过去时态的主动语态的时态学习是一个渐进的过程，是被动语态的基础。主动语态的谓语动词又分为be动词，实意动词和情态动词，过去分词的变化更是使人眼花缭乱，容易出错。
从学生角度分析为什么难 在英语学习中,学生首先要熟练掌握一般过去时态的主动语态的构成及意义，在此前提下再进行两种语态的对比，让学生理解被动语态的意义及构成自身的复杂性致使学生在习得和使用中出现困难。
难点教学方法 1.通过录制屏幕直观演示一般过去时态的主动语态结构和被动语态的结构。 2.通过在每个结构后展示一或两个例句，并且对例句进行对比解析。
教学环节 教学过程
导入 在展示幻灯片的同时，教师提问Do you know what these inventions are Do you know who these inventors are
知识讲解 （难点突破） 二、一般过去时被动语态结构：（passive voice） 英语中有主动(active voice)和被动(passive voice)两种语态。（类似于汉语中的 “把”字句和“被” 字句）. They bought a camera last term． A camera was bought by them last term. We planted many trees last year. Many trees were planted by us last year. 三、动词的过去分词的构成 Bell invented the telephone in 1876. The telephone was invented by Bell in 1876. Karl Benz invented the first car in 1885. The first car was invented (by Karl Benz) in 1885. J. L. Baird invented the first television in 1927. The first television was invented (by J. L. Baird) in 1927. 四、被动语态的几种句型 肯定句：主语＋be + 过去分词＋(by ~) A sweet song was sung by her on the stage. 否定句：主语＋be not ＋过去分词＋(by ~) A sweet song wasn’t sung by her on the stage. 一般疑问句：Be ＋主语＋过去分词＋(by ~) Was a sweet song sung by her on the stage 特殊疑问句 疑问词 + be + 主语 +过去分词 + (by…) Where was a sweet song sung by her
课堂练习 （难点巩固） 此处按下暂停键，由学生来进行练习吧： They built the house last year. The house was built by them last year. The house wasn't built by them last year. Was the house built by them last year He took good care of his sister yesterday. His sister was taken good care of by him yesterday. His sister wasn't taken good care of by him yesterday. Was his sister taken good care of by him yesterday We cleaned our classroom just now. Our classroom was cleaned by us just now. Our classroom wasn't cleaned by us just now. Was our classroom cleaned by us just now They used this room for resting. This room was used for resting by them. This room wasn't used for resting by them. Was this room used for resting by them
小结 此处再次按下暂停键，由学生来进行概括总结： 主动语态变被动语态的步骤： 1. 主动语态的宾语变为被动语态的主语； 2. 主动句的谓语动词变为被动结构； 3.被动语态的否定句，一般疑问句和时态的转换要靠be动词来完成。即：否定句在be动词后面加not,一般问句be动词提前。 4. 主动句的主语变为被动句的宾语，由by引出，当不强调动作的执行者时，常省略。