Unit 7 Grammar Focus-4c 课件 -2025-2026学年人教版英语九年级全册

Grammar Focus-4c Unit 7 Teenagers should be allowed to choose their own clothes. Review 主动语态：表示主语和谓语之间是_________关系 被动语态：表示主语和谓语之间是_________关系 英语的语态是通过动词形式的变化表现出来的。 英语中有两种语态：主动语态和被动语态。 The classroom is cleaned by us every day . 主动 被动 被动语态的谓语动词结构为： be + 动词的过去分词 be 有时态和人称的变化 She waters flowers every day. Thomas Edison invented the electric bulb. We should clean the classroom every day. 母亲节每年都被我们庆祝。 母亲节去年被我们庆祝。 Mother's Day is celebrated by us every year. Mother's Day was celebrated by us last year. 1.一般现在时的被动语态 is/are + 动词过去分词 2.一般过去时的被动语态 was/were + 动词过去分词 3、情态动词的被动语态： 情态动词 + be + 动词的过去分词 青少年应该被允许选择自己的服装。 Teenagers _______ ___ ________to choose their own clothes. should be allowed I don’t think sixteen-year-olds should be allowed to drive. I agree. They aren’t serious enough. Do you think teenagers should be encouraged to make their own decisions? Teenagers should not be allowed to have part-time jobs. No, I don’t agree with this. Teenagers are too young to make their own decisions. I disagree. They can learn a lot from working. If you don’t use a flash, then it may be OK. Do you think we may be allowed to take photos if we don’t use a flash? Can you find the passive voice from this form? 含有情态动词的被动语态 情态动词+ be + 动词过去分词 can/could may/might will/would should must 1.情态动词无时态和人称的变化； 2.情态动词后动词变回原形。 情态动词 含情态动词 的被动语态 句子结构 翻译： 否定句: 一般疑问句 青少年们应该被允许选择自己的衣服。 Teenagers should be allowed to choose their own clothes. Teenagers should not be allowed to choose their own clothes. Should teenagers be allowed to choose their own clothes? 含情态动词 的被动语态 易错点 易错点一： 表达否定时，“not”接在情态动词后。 Paper and water wasted by people. A. will be not B. will not be C. should be not D. should not be 2. In 2050, 2G used in the world. A. will be not B. wills not be C. should be not D. should not be 易错点二： 判断下列句子是否正确？正确（T）错误（F） 情态动词 + 主语 + be + done + 其他内容? 疑问句中， 情态动词后紧跟主语。 Should classroom be cleaned by students? Must be my room cleaned by myself now? Should be food wasted by people? Can the homework be finished tomorrow? Can be the moon seen at night? T F F T F 被动语态的 注意事项 The pears taste nice. 那些梨味道很好。 look, sound, taste, smell等连系动词 __________________ 用主动结构表被动意义 这个房间需要打扫。 The room needs cleaning. need doing sth.=need to be done 商店每天早上9点开门。 The shop opens at 9:00 a.m. every day. 在表示“开始”（start,begin,open） "结束"（end,close,stop） 1.You must clean your bedroom every day. Your bedroom ______________________________________ 2.I will do the housework in the afternoon. The housework will ___________________________________. Rewrite the sentences according to the example. 4a must be cleaned every day be done in the afternoon 一般将来时的被动语态： will / be going to + be + 动词的过去分词 3. Parents will encourage their children to do social work for their community. Children ________________________________________________. 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 ________________________________________________. will be encouraged to do social work for their community must be kept away from the Internet should be given chances to make their own decisions 作社会活动 keep ...away from 远离 give sb. a chance to do sth. 给某人一个做某事的机会 Fill in the blanks with the correct forms of the words in brackets. 4b 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 be educated to take care of themselves from a young age. This way, when they _________ (start) working they can manage their own lives. 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. But the young should then look after their parents as they get older. That is why many Chinese adults ______________ (continue) to live with their parents. be asked are allowed start move take continue manage to do sth. 设法做成某事 1. The New Silk Road will offer a good _____ for more nations to communicate. A. chance B. habit C. question D. price 2. — The Forum（论坛）on China-Africa Cooperation Meeting will take place in Beijing this year. — Yes. I hear thousands of guests ______ to the meeting then. A. will be invited B. will invite C. are invited D. invite 3. They all ______ Laura about building a museum here. A. waited for B. handed in C. agreed with D. knocked at 4. — Did you talk back to your mother when you were a child? — Yes, but now I realize I was wrong. I really regret ______ that silly thing to my mum. A. do B. to do C. doing D. did Exercises Homework $$