含情态动词的被动语态

1、含情态动词的被动语态含情态动词的被动语态含情态动词的被动语态含情态动词的被动语态can, could (能；会能；会), may; might (可以可以) must(必须必须), should(应该应该), would(愿意愿意)have to(必须；不得不必须；不得不), had better(最好做最好做)1. We should allow teenagers to watch TV on Sunday. Teenagers should be allowed to watch TV on Sunday( by us) .2. My mother can cook delicious

2、meals. Delicious meals can be cooked ( by my mother ).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 Internet. can/could must should may/might had better have to 情态动词情态动词+be +过去分

3、词过去分词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 Mr Smith. A. can mend B. can mended C. can be mend D. can be mended4.Young trees should _ every year. A.

4、be plantedB. planted C. plant D. are planted1.Your homework should be finished first. Your homework shouldnt be finished first. Should your homework be finished first ?2. This magazine can be taken home. This magazine cant be taken home. Can this magazine be taken home ? 3. Trees must be watered eve

5、ry day. Trees mustnt be watered every day. Must trees be watered every day? 情态动词情态动词+not + be + 过去分词过去分词 can/could must should may/might had better情态动词情态动词+ 主语主语+ be + 过去分词过去分词 Can/Could Must Should May疑问词疑问词+情态动词情态动词+ 主语主语+ be + 过去分词过去分词 can/could must should may/mightWhen must this task be finishe

6、d? 这项任务必须在什么时候完成？这项任务必须在什么时候完成？含情态动词的被动语态含情态动词的被动语态肯定句肯定句: : 主语主语+ + 情态动词情态动词+ be+ + be+ 动词过去分词动词过去分词. .否定句否定句: : 主语主语+ + 情态动词情态动词+ + notnot+ be+ be+动词过去分词动词过去分词. .一般疑问句一般疑问句: : 情态动词情态动词+ + 主语主语+ be+ + be+ 动词过去分词动词过去分词? ?特殊疑问句：特殊疑问句：特殊疑问词特殊疑问词+ + 情态动词情态动词+ + 主语主语+ + be + be + 过去分词过去分词 ？4a Rewrite th

7、e 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. Teenagers _ _.3. Can Lucy do her homework tomorrow instead? Can _ _? should be encouraged (by their paren

8、ts) to do social work for their community the homework be done (by Lucy) tomorrow insteadn. 社区，社区，社团社团4. Do you think we must keep teenagers away from the Internet? Do you think teenagers _?5. Parents should give teenagers chances to make their own decisions. Teenagers _ _ must be kept away from the

9、 Internetshould be given chances to make their own decisions.keepaway from 避免接近，远离避免接近，远离n. 机会，可能机会，可能性性自己做决定自己做决定Should teenagers _ (ask) to move out when they start working? In many Western countries, teenagers _ (allow) to move out at eighteen. Their parents believe that they should _ (educate) t

10、o 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 allowedbe educatedstartv. 教育；教导教育；教导v. 完成；应付完成；应付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.