情态动词及情态动词的被动语态精选PPT.ppt

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1、关于情态动词及情态动词的被动语态第1页，讲稿共14张，创作于星期日2情态动词有哪些情态动词有哪些?1.can/may/must/will/shall/should/ought to2.need/dare3.had better/would rather,used to/have to/be able to第2页，讲稿共14张，创作于星期日3情态动词的含义情态动词的含义序号原形过去式主要含义1cancould2maymight3mustmusthad to4needneeded5daredared6willwould7shallshould1.1.能力能力能力能力2.2.请求请求请求请求/准许准

2、许准许准许3.3.可能性可能性可能性可能性1.1.请求请求请求请求/准许准许准许准许2.2.可能性可能性可能性可能性*3.3.祝愿祝愿祝愿祝愿1.1.义务义务义务义务(必须必须必须必须);2.);2.猜测猜测猜测猜测(肯定肯定肯定肯定)需要需要需要需要敢敢敢敢愿意愿意愿意愿意1.1.征求意见征求意见征求意见征求意见 2“2“应该应该应该应该”(should)(should)第3页，讲稿共14张，创作于星期日4序号序号原形原形过去式过去式主要用法主要用法8 8be able tobe able towas/were was/were able toable to9 9have tohave to

3、had tohad to1010ought toought toought toought to1111used toused to1212had betterhad better1313would ratherwould rather“能够能够能够能够”（能力）（能力）（能力）（能力）“不得不不得不/必须必须”“应该应该应该应该”“过去（常常）过去（常常）”“最好最好”“宁愿宁愿”情态动词的含义情态动词的含义第4页，讲稿共14张，创作于星期日 can/could be done must be done should be done may/might be done had better

4、be done have to be done含情态动词的被动语态：含情态动词的被动语态：情态动词情态动词+be+PP第5页，讲稿共14张，创作于星期日否定式：情态动词否定式：情态动词+not+be+p.p can/could not be done must not be done should not be done may/might not be done had better not be done have not to be done第6页，讲稿共14张，创作于星期日疑问式：情态动词疑问式：情态动词+主语主语+be+p.p can/could+主语主语+be done must+

5、主语主语+be done should+主语主语+be done may/might+主语主语+be done had+主语主语+better be done have+主语主语+to be done第7页，讲稿共14张，创作于星期日1.I can finish the work.The work can be finished by me.Can the work be finished by you?2.We should plant many more trees.Many more trees should be planted by us.Should many more trees

6、 be planted by us?第8页，讲稿共14张，创作于星期日Teenagers should be allowed by parents to drive the car.3.Parents should allow teenagers to drive the car.Should teenagers be allowed by parents to drive the car?4.You can pass the exam if you study hard.The exam can be passed(by you)if you study hard.Can the exam

7、be passed(by you)if you study hard?第9页，讲稿共14张，创作于星期日water(浇水浇水)Trees must be watered by them every day.They must water trees every day.Must trees be watered by them every day?第10页，讲稿共14张，创作于星期日People may catch fish in the river.Fish may be caught in the river(by people).第11页，讲稿共14张，创作于星期日1.My mother

8、 can cook delicious meals.Delicious meals can be cooked by my mother.2.Students will use these textbooks next term.These textbooks will be used next term by students.3.You should water trees often.Trees should be watered by you often .4.You must not plant trees in very dry earth.Trees must not be pl

9、anted by you in very dry earth.第12页，讲稿共14张，创作于星期日3.Sixteen-year-olds should be allowed to drive.(先改为否定句，再改一般疑问句先改为否定句，再改一般疑问句)Should sixteen-year-olds be allowed to drive?Sixteen-year-olds shouldnt be allowed to drive.Yes they should./No,they shouldnt.4.I think the work should be done at once.(改为否定句改为否定句)I dont think the work should be done at once.第13页，讲稿共14张，创作于星期日感谢大家观看第14页，讲稿共14张，创作于星期日