情态动词及情态动词的被动语态课件.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，此课件共14页哦2第2页，此课件共14页哦3序号原形过去式主要含义1cancould2maymight3mustmusthad to4needneeded5daredared6willwould7shallshould第3页，此课件共14页哦4“不得不不得不/必须必须”“过去（常常）过去（常常）”“最好最好”“宁愿宁愿”第4页，此课件共14页哦 can/could be done must be done should be done may/might be done had better be done have to be done含情态动词的被动

2、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，此课件共14页哦否定式：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，此课件共14页哦疑问式：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+主语主语+be done should+主语主语+be done may/migh

3、t+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，此课件共14页哦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 be planted by us?第8页，此课件共14页哦Teenagers should

4、 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 be passed(by you)if you study hard?第9页，此课件共14页哦wate

5、r(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，此课件共14页哦People may catch fish in the river.Fish may be caught in the river(by people).第11页，此课件共14页哦1.My mother can cook delicious meals.Delicious meals can be cooked by my moth

6、er.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 planted by you in very dry earth.第12页，此课件共14页哦3.Sixteen-year-olds sh

7、ould 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，此课件共14页哦感谢大家观看第14页，此课件共14页哦