情态动词及情态动词的被动语态.pptx

含情态动词的被动语态情态动词有哪些?can /may/must/ will / shall / should / ought toneed /darehad better/ would rather, used to / have to / be able to情态动词的含义序号原形过去式主要含义1cancould2maymight3mustmusthad to4needneeded5daredared6willwould7shallshould1.能力2.请求/准许3.可能性1.请求/准许2.可能性 *3.祝愿1.义务(必须); 2.猜测(肯定)需要敢愿意1.征求意见 2“应该”(should)情态动词的含义序号原形过去式主要用法8be able towas/were able to9have tohad to10ought toought to11used to12had better13would rather“能够”（能力）“不得不/必须”“应该”“ 过去（常常）”“最好”“ 宁愿”含情态动词的被动语态： 情态动词+be +PP can/could be done must be done should be done may/might be done had better be done have to be done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疑问式：情态动词+ 主语+ be + p.p can/could +主语 +be done must +主语 + be done should +主语 + be done may/might +主语 + be done had +主语 + better be done have +主语 + to be done1.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?3.Parents should allow teenagers to drive the car.Teenagers should be allowed by parents 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?water(浇水)They must water trees every day.Trees must be watered by them every day.Must trees be watered by them every day?Practice :People may catch fish in the river.Fish may be caught in the river (by people).1.My mother 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 planted by you in very dry earth. 3. Sixteen-year-olds should be allowed to drive.