人教英语九年级Unit7被动语态教学课件(共18张PPT).ppt

被动语态被动语态教学目标：教学目标：1.说出被动语态的基本构成和各种说出被动语态的基本构成和各种 时态的构成形式；时态的构成形式；2.2.熟记情态动词的被动语态形式熟记情态动词的被动语态形式; ;3.3.会把主动句变为被动句。会把主动句变为被动句。被动语态被动语态概念与构成概念与构成概念：概念：基本构成：基本构成：各种时态各种时态一般现在时一般现在时一般过去时一般过去时主动变被动主动变被动用法用法（什么情况用被动）（什么情况用被动）基本三步骤基本三步骤含动词短语含动词短语带双宾语和复合宾语带双宾语和复合宾语情态动词情态动词小组合作展示交流熟能生巧重点考点：重点考点：各种时态的被动语态各种时态的被动语态 1. Now English _B_ by more and more people all over the world. A. speaks B. is spoken C. was spoken一般现在时态的被动语态：一般现在时态的被动语态： am / is / are + V(p.p.) 2. A letter _B_ to her father by him last night. A. writes B. is written C. was written一般过去时态的被动语态一般过去时态的被动语态： was / were + V(p.p.) 3. To my surprise, a new library _A_ in our school next year . A. will be built B. is built C. was built一般将来时态的被动语态：一般将来时态的被动语态： will / shall + be + V(p.p.) 4. Three bridges _C_ since last year in the village. A. have built B. were built C. have been built现在完成时的被动语态：现在完成时的被动语态： have / has + been + V(p.p.) 1.You must clean your bedroom every day. Your bedroom _ every day.must be cleaned2.Parents should encourage teenagers to do social work for their community. Teenagers _ to do social work for their community.should be encouraged 本单元重点考点：本单元重点考点：含有情态动词的主动变被动含有情态动词的主动变被动 3.Can Lucy do her homework tomorrow instead? _ Lucys homework_ tomorrow instead?4.Do you think we must keep teenagers away from the Internet? Do you think teenagers _ away from the Internet?must be keptCan be done 5.Parents should give teenagers chances to make their own decisions. Teenagers _ chances to make their own decisions.should be given4b Fill in the blanks with the correct forms of the words in brackets.be askedare allowedbe educatedstartmovetakecontinue4c You and your friend are starting an Enghish club. Make a list of rules about what should and should not be allowed.Eg: 1.Members should be allowed to use dictionaries. 2. 3. 4. 5.课堂小结Thank you!Homework1. Review the usage of the passive voice .2. Finish your mind map and do some exercises .