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1、关于含情态动词的被动语态第一张，PPT共十七页，创作于2022年6月含情态动词的被动语态含情态动词的被动语态常用的情态动词有：常用的情态动词有：can,could(能；会),may;might(可以)must(必须),should(应该),would(愿意)have to(必须；不得不),had better(最好做)第二张，PPT共十七页，创作于2022年6月主动句变被动句的步骤与其它情况相同。主动句变被动句的步骤与其它情况相同。1.We should allow teenagers to watch TV on Sunday.Teenagers should be allowed to w
2、atch TV on Sunday(by us).2.My mother can cook delicious meals.Delicious meals can be cooked(by my mother).第三张，PPT共十七页，创作于2022年6月3.People may catch fish in the river.Fish may be caught in the river(by people).4.we must keep teenagers away from the Internet?Teenagers must be kept away from the Interne
3、t.第四张，PPT共十七页，创作于2022年6月 can/could must should may/might had better have to 情态动词+be+过去分词be done结构结构第五张，PPT共十七页，创作于2022年6月1.The flowers _often.A.must be water B.must be watered C.must watered D.must water2.The books may_ for two weeks.A.be kept B.be borrowed C.keep D.borrow3 The broken bike_ here by
4、Mr Smith.A.can mend B.can mended C.can be mend D.can be mended4.Young trees should _ every year.A.be plantedB.planted C.plant D.are planted第六张，PPT共十七页，创作于2022年6月1.Your homework should be finished first.Your homework shouldnt be finished first.Should your homework be finished first?2.This magazine ca
5、n be taken home.This magazine cant be taken home.Can this magazine be taken home?第七张，PPT共十七页，创作于2022年6月3.Trees must be watered every day.Trees mustnt be watered every day.Must trees be watered every day?第八张，PPT共十七页，创作于2022年6月情态动词+not+be+过去分词 can/could must should may/might had betternot be done否定式否定
6、式第九张，PPT共十七页，创作于2022年6月情态动词+主语+be+过去分词 Can/Could Must Should May+主语主语 be done？一般疑问式一般疑问式第十张，PPT共十七页，创作于2022年6月疑问词+情态动词+主语+be+过去分词 can/could must should may/might+主语主语 be done？疑问词疑问词特殊疑问式特殊疑问式When must this task be finished?这项任务必须在什么时候完成？第十一张，PPT共十七页，创作于2022年6月含情态动词的被动语态肯定句:主语+情态动词+be+动词过去分词.否定句:主语+情
7、态动词+not+be+动词过去分词.一般疑问句:情态动词+主语+be+动词过去分词?特殊疑问句：特殊疑问词+情态动词+主语+be+过去分词？第十二张，PPT共十七页，创作于2022年6月4a Rewrite the sentences according to the example.1.You must clean your bedroom every day.Your bedroom must be cleaned every day.2.Parents should encourage teenagers to do social work for their community.Tee
8、nagers _ _.3.Can Lucy do her homework tomorrow instead?Can _ _?should be encouraged(by their parents)to do social work for their community the homework be done(by Lucy)tomorrow insteadn.社区，社团第十三张，PPT共十七页，创作于2022年6月4.Do you think we must keep teenagers away from the Internet?Do you think teenagers _?
9、5.Parents should give teenagers chances to make their own decisions.Teenagers _ _ must be kept away from the Internetshould be given chances to make their own decisions.keepaway from 避免接近，远离n.机会，可能性自己做决定第十四张，PPT共十七页，创作于2022年6月Should teenagers _(ask)to move out when they start working?In many Western
10、 countries,teenagers _(allow)to move out at eighteen.Their parents believe that they should _(educate)to take care of themselves from a young age.This way,when they _(start)working they can manage their own lives.4b Fill in the blanks with the correct forms of the words in brackets.be askedare allow
11、edbe educatedstartv.教育；教导v.完成；应付第十五张，PPT共十七页，创作于2022年6月However,in most Asian societies,it is not common for teenagers to _(move)out.Chinese parents believe that it is better for children to live with parents who can _(take)care of them.But the young should then look after their parents as they get older.That is why many Chinese adults _(continue)to live with their parents.movetakecontinuen.社会第十六张，PPT共十七页，创作于2022年6月感谢大家观看第十七张，PPT共十七页，创作于2022年6月