情態(tài)動詞及情態(tài)動詞的被動語態(tài)

1、2021/3/91含情態(tài)動詞的被動語態(tài)含情態(tài)動詞的被動語態(tài)2021/3/922021/3/93序號序號原形原形過去式過去式主要含義主要含義1cancould2maymight3mustmusthad to4needneeded5daredared6willwould7shallshould2021/3/94“不得不不得不/必須必須”“ 過去（常常）過去（常常）”“最好最好”“ 寧愿寧愿”2021/3/95 can/could be done must be done should be done may/might be done had better be done have to be d

2、one含情態(tài)動詞的被動語態(tài)：含情態(tài)動詞的被動語態(tài)： 情態(tài)動詞情態(tài)動詞+be +PP2021/3/96否定式：情態(tài)動詞否定式：情態(tài)動詞+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 done2021/3/97疑問式：情態(tài)動詞疑問式：情態(tài)動詞+ 主語主語+ be + p.p can/could +主語主語 +be done must +主語主語 + be done should +

3、主語主語 + be done may/might +主語主語 + be done had +主語主語 + better be done have +主語主語 + to be done2021/3/981.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 b

4、y us?2021/3/99Teenagers 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 be passed (by you

5、) if you study hard?2021/3/910water(澆水澆水)Trees must be watered by them every day.They must water trees every day.Must trees be watered by them every day?2021/3/911People may catch fish in the river.Fish may be caught in the river (by people).2021/3/9121.My mother can cook delicious meals. Delicious

6、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

7、. 2021/3/9133. Sixteen-year-olds should be allowed to drive.(先改為否定句，再改一般疑問句先改為否定句，再改一般疑問句) 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.(改為否定句改為否定句)I dont think the work shou

8、ld be done at once.2021/3/914Drills:1.We should look after elder people very well.2.We should answer these questions as soon as possible.3.We must clean our classroom this afternoon.4.You must hand in your homework before nine oclock.5.You can bring your friends to my birthday party tomorrow evening.6.You shouldnt touch the