【课件】Unit+3+Discovering+Useful+Structures+课件人教版（2019）必修第二册.pptx

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1、Unit 3 TensesTensesthe present perfect the present perfect passive viocepassive vioceWhat do you know the present perfect passive vioce?Lead-inlearning aims:1)Look at the following content in exercise about“现在完成时的被动语态”on book P65.2)To find out the concept and basic structure of“现在完成时的被动语态”.3)To find

2、 out the key and difficult points.4)To find out the points you dont understand.We have finished the homework.The homework has been finished by us.Many visitors have visited the Great Wall.The Great Wall has been visited by many visitors.现在完成时被动语态：现在完成时被动语态：have/has been done观察句子观察句子1.Many people hav

3、e been helped bay the club.2.His novel has not been finished.3.Have the new booking systems for tickets been used?4.How long has the battery been used?have/has been donehave/has not been doneHave/Has特殊疑问词特殊疑问词+have/has应用实践：应用实践：1.Your car has been repaired.2.The flower hasnt been cleaned.3.Have thos

4、e rooms been painted?4.How long has the film been on?观察思考：观察思考：1.It is so late that the door has already been locked.2.His paper hasnt been handed in yet.探究总结：探究总结：当动词为非延续性动词时，可与当动词为非延续性动词时，可与already或或yet连连用，但用，但不能不能与与for或或since引导的表示一段时间的引导的表示一段时间的状语连用状语连用现在完成时的被动语态的三个用法：现在完成时的被动语态的三个用法：1.表示过去发生的动作对

5、现在造成的影响与结果表示过去发生的动作对现在造成的影响与结果The club has been founded five years ago.My report has been handed in a week ago.2.表示一个被动的动作状态开始于过去并向后表示一个被动的动作状态开始于过去并向后持续持续探究总结探究总结：表示一个被动的动作或状态开始于过去，持续到现在，并有可能持续下去，常于for或since引导的时间状语连用或用于”how long.?”句型中。观察思考：观察思考：His computer has been reparied for two hours.The vauab

6、le book has been kept in the library since it was bought last year.have been learnedfor two years应用实践：has been finishedhave been made应用实践：应用实践：1.The work has been finished ahead of time.Over time,the computer has been changed a lot.Jack has been made to work harder than before.Has the book been retu

7、rned yet?Have ways been found to make waste water clean?Li Hua has been praised by his boss for his excellent work.2.has been made have been used has been translated Has been booked3.They have been married for 10 years.The old man has been taken good care of for 10 years.Homework：1.review what you have learned 2.recited them and dictate them to hand in your group monitor 3.write your mistakes in relevant notebook 4.do all the rest exercises in class 5.do all the exercises in exercise book and if possible review next classThanks