Book 2 Unit 3 Computers GrammarTeacher: Wang silin一、教学目标：1.使学生理解现在完成时的被动语态的概念及掌握其句式结构2.使学生能够正确的使用现在完成时的被动语态二、教学内容了解现在完成时的被动语态的结构，掌握现在完成时的被动语态的实施原则三、 教学重难点1. 现在完成时的被动语态在具体语境当中的应用2. 现在完成时的主动被动语态的转换四、 教学准备多媒体教学设备五、 教学过程Step 1. RevisionThe form of the present perfect tense and its meaningsThe form：主语+ have/has + doneIts meanings：1.表示动作发生在过去，但与现在的情况有联系 2.表示从过去某时间开始一直持续到现在并还可能持续下去的动作Showing the pictures to the student, and asked the Students some questions. Then guide them to answer the questions using this form-主语+have/has+done. Step 2. Grammar learningIn order to impress students, ask them to read out the name of the present perfect passive voice.1.DiscoveringShow pictures and sentences to the students.2.ThinkingLet students look at the tense used in the sentences they picked out and think over this question:What is the structure of the present perfect passive voice?3.Summing upThe structure of it is “have /has+been+done”. it is a combination of the present perfect tense(have/has+done)and the passive voice(be+done）。Then tell them the meanings of the present perfect passive voice through 3 examples.Step 3. Change a sentence into the present perfect passive voice.1.Analyze the sentences to the students.2.Practice1.The teacher has borrowed the books.老师把那些书借走了。The books_ by the teacher.这些书被老师借走了。2.He has eaten a piece of cake.他吃了一块蛋糕。A piece of cake _ by him.一块蛋糕被他吃了。3.They have asked him some questions. 他们问了他一些问题。He _ some questions by them.他被问了一些问题。Suggested answer:1.has been borrowed2.has been eaten3.has been askedStep 4. Grammar practice Exercise 1. find out what is wrong with the following sentences.1. The school has moved to the new address for 4 years.2.Many new buildings been built since 1980.Suggested answers:The school has been moved to the new address for 4 yearsMany new buildings has been built since 1980.Exercise 2. Fill the blank with the words in bracket in their proper forms.A new building _ (build) in our school already.More and more trees_ (plant) in our campus since 2001.My English _ ( improve) a lot so far.Suggested answers:1.has been built2.has been planted3.has been improvedStep 5. ConsolidationComplete the passage with the words in bracket in their proper form. Lin Gao is my hometown. I _ (live) here for more than 20 years. So I _ (see) a lot of changes of Lin Gao. For example, many buildings _ (build) in the past few years. The road was narrow and old in past. But now it _ (improve). Thanks to these great changes, Lin Gao _ (know) by people already.Suggested answer:have livedhave seenhave been builthave been improvedhas knownStep 6. Homework1.复习并理解本课所讲的语法规则 2.选做课本上转换句型练习题六、 板书设计：现在完成时：have/has +done被动语态的构成形式：be+done, be有人称、数、时态等变化Have/has +been+done=have/has done+be done