Unit 7,Section A Grammar Focus,cry all night stay by ones side sleep in warm arms run through the field make sure keep sb. from danger give sb. a hug lift up talk back,整夜哭 待在某人身边 睡在温暖的臂弯里 穿过田野 确定；确保 使某人远离危险 拥抱某人 举起，提起 回嘴；顶嘴,Review,Translate the phrases.,watch scary movies give sb. awful dreams be back by ten think back to those times cough for days have scary dreams be late for school stay out regret doing sth.,看恐怖电影 带给某人恶梦 在10点前回来 回想那些时光 咳嗽好几天 做可怕的梦 上学迟到 待在外面；不回家 后悔做过某事,I think students should be allowed to do homework with friends. Sixteen-year-olds should not be allowed to drive. Do you think sixteen-year-olds should be allowed to choose their own clothes?,Look at these sentences.,含情态动词的被动语态,肯定句: 主语+ 情态动词+be+ 动词过去分词. 否定句: 主语+情态动词+not+ be+动词过去分词. 疑问句: 情态动词+ 主语+ be+ 动词过去分词?,(一)将主动语态的宾语变成被动语态的主语。 (二)将含情态动词的主动句式变成被动句式，即：“情态动词+动词原形”变成“情态动词+be+过去分词”，然后再在其后加“by+主动句中的主语(人称代词用宾格)”。by短语也可省略。 请看下列各句：,转变方法,You should finish your homework first. Your homework should be finished (by you) first. You can take this magazine home. This magazine can be taken home (by you).,含情态动词的疑问句、否定句的变化均需借助于情态动词完成。 1. 一般疑问句：直接将被动语态的陈述句中的情态动词提前。 Must this task be finished at once? 这项任务必须立即完成吗？,句式变换,注意：含情态动词的被动语态的一般疑问句的回答，应保留原情态动词，但must表“必须”时，其否定回答应用neednt；need表“必要”时，其肯定回答应用must。如： - Must my exercise book be handed in now? 我的练习本必须现在上交吗？ - Yes, it must. 是的，必须现在上交。 （No, it neednt. 不，不必现在上交。） - Need he be operated on at once? 他必须立即手术吗？ - Yes, he must. 是的，他必须。 （No, he neednt. 不，他不必。）,2. 特殊疑问句 ：由特殊疑问词加上被动语态的一般疑问句构成。 When must this task be finished? 这项任务必须在什么时候完成？ 3. 否定句： 在情态动词后面加上not或never即可，但must表必要时否定式为neednt。 This task neednt be finished at once. 这项任务没必要立即完成。,4. 反意疑问句：借助情态动词构成附加疑问部分。如： This bridge can be built next year, cant it? 这座桥明年能建成，是吗？,Teenagers should be allowed to choose their own clothes. 应该允许青少年选择他们自己的服装。 Students should not be allowed to have part-time jobs. 不应该允许学生们做兼职工作。 Can these books be taken out of the reading room? 可以把这些书带出阅览室吗？ When must the work be finished? 这些工作必须什么时候完成？,2. Parents should encourage teenagers to do social work for their community. 3. Can Lucy do her homework tomorrow instead?,Teenagers should be encouraged (by their parents) to do social work for their community.,Can the homework be done (by Lucy) tomorrow instead?,4a Rewrite the sentences according to the example.,4. Do you think we must keep teenagers away from the Internet? 5. Parents should give teenagers chances to make their own decisions.,Do you think teenagers must be kept away from the Internet?,Teenagers should be given chances to make their own decisions.,The keys,be asked,are allowed,4b Fill in the blanks with the correct forms of the words in brackets.,be educated,start,move,take,continue,4c What rules should an English club have? Make a list of rules for it.,Free Talk,Sample Dialogue 1 A: Members should be allowed to use dictionaries. B: Yes, but they should only use English-English dictionaries.,Members are allowed to use English-English dictionaries.,A: Members shouldnt be allowed to speak Chinese. B: I agree. Only in this way can you improve your English.,Sample Dialogue 2,Young trees should _ every year. A. be planted B. planted C. plant . 按要求完成下列各句每空一词含缩写。 1. We must do the work right now. (改为被动语态) _ _ _ _ _ right now.,A,The work must be done,. 选择最佳答案。,2. Teenagers should be allowed to go out with their friends on school nights. (改为否定句 ) Teenagers _ _ _ to go out with their friends on school nights. 3. A book should be read each month. (改为一般疑问句) _ _ _ _ _ each month?,shouldnt be allowed,Should a book be read,1. Their work must _ (finish) by four oclock. 2. Your homework should _ (do) by yourself. 3. These books mustnt _ (take) out of the reading room. 4. Should these food _ (keep) dry?,be finished,be done,be taken,be kept,III. 用所给词的适当形式填空。,IV. 句型转换 1. You should make up the bed every day. (改为被动语态) The bed _ _ _ up every day. 2. We cant see stars in the day time. (改为被动语态) Stars _ _ _ in the day time. 3. You must return the book on time. (改为被动语态的一般疑问句形式) _ the book _ _ on time?,should be made,cant be seen,Must,be returned,【2011天津】39. Today a lot of information can _ online. A. receive B. be received C. is received D. receiving 答案：B 【解析】 被动语态。今天有很多信息能在网上收到，信息被收到要用被动语态。含有情态动词的被动语态的构成：情态动词+be +过去分词。,中考链接,【2011浙江金华】22. Must we clean the classroom now? No, you neednt. It_ after school. A. may clean B. must clean C. need be cleaned D. can be cleaned 答案：D 【解析】由句意可知it指classroom，it和clean为被动关系，所以用被动语态，含有情态动词的被动语态结构为“情态动词+be+动词过去分词”。排除A和B。need意为“需要”，can意为“可能，可以”。由句意“我们必须现在就打扫教室吗？不，不必要。可以放学后打扫”可知, 故选D。,【2013山东青岛】 The song reminds me of my old school days as soon as it _. A. is played B. plays C. will be played D. will play 答案： A 【解析】考查被动语态的用法。句意：这首歌被播放的时候，使我想起了我的学生时代。it作play的承受者，故用被动语态。,【2