Unit 13 Section A（Grammar～4c)课件-2024-2025学年人教版英语九年级全册

Unit 13 We're trying to save the earth! Period Four Section A（Grammar-4c) Objective To learn about The Present progressive, passive voice, Present Perfect and Modal Verbs take part in afford turn off reusable pay for take action transportation 参加 v. 买的起；承担的起（后果） 关掉 adj. 可重复使用的 付费；付出代价 采取行动 n. 运输业；交通运输 Words Review Grammar Focus We’re trying to save the earth. Present progressive The river used to be so clean. used to The air is badly polluted. Passive voice No scientific studies have shown that shark fins are good for health. Present perfect We should help save the sharks. Modal verbs 现在进行时: Present Progressive 结构: be (am/is/are) + v.-ing 标志词：look, listen, now, right now… e.g. Look! The boy is crying. 定义：表示说话时(瞬间)正在进行的动作, 也表示目前或现阶段正在进行的动作。 1)与always, all the time等副词连用，表示动作反复或习惯。此时句子常含有说话者的强烈情感在内。表达较强的“责备”或“表扬”之意。 ① You are always changing your mind. 你总是主意不定。(太烦人了。) ② He is always helping others. 他总是帮助别人。(他真是个好人。) 现在进行时--用法 2) 对于come, go, leave, arrive, start等表示位置移动的动词常可用进行时态表将来。 ① He is leaving on Wednesday. 他将于周三离开。 ② Mary isn’t here at the moment. She is coming later. 玛丽现在不在这儿，她一会儿来。 What a fine day today! Look! What are they doing? Exercise 用括号内所给动词的适当形式填空。 Listen! The phone __________(ring). Please go to answer it. — Alan, it’s late. Why not go to bed? — Jenny hasn’t come back yet. I ___________(wait) for her. 3. — What’s your father doing now? — He __________ (write) a letter in the study. is ringing am waiting is writing used to do sth. 表示过去常常做某事, 而现 在往往不做了, 后接动词原形。 be used to doing sth. 表示习惯于做某事 e.g. I used to get up at six o’clock. Joe is used to drinking a cup of coffee every morning. used to do与be used to doing Translation. 1. 她过去常常周末和朋友闲逛。 2. 他习惯于每天晚上熬夜。 Exercise She used to hang out with friends on weekends. He is used to staying up every night. 被动语态：Passive voice 定义：表示主语是动作的承受者，即行 为动作的对象的一种语态。 结构：be + 过去分词 e.g. A new school was built last year. Our classroom is cleaned every day. The first section of New College English is designed for speaking practice and is based on pictures and topics.　　 These computers were made in our own country last year. Shall we be asked to attend the opening ceremony?　 ①一般现在时的被动语态：am/is/are + 过去分词 　　 ②一般过去时的被动语态：was/were+过去分词 ③一般将来时的被动语态：will/shall+be+过去分词 Translate the sentences by using Passive voice. 1. 刚才一些老年人参观了博物馆。 2. 工人们使用不同种类的机器工作。 The museum was visited by some old people just now. Different kinds of machines are used to work by the workers. Exercise 用括号内所给动词的适当形式填空。 1. The Secondary School Entrance Exams _______ (hold) in June. 2. A strange noise __________ (hear) by his mother last night. 3. A wide road _____________ (build) between the two villages by those people next year. is held was heard will be built 结构: has/have + 过去分词 标志词：already, yet, ever, never, since, for… e.g. I haven’t finished my homework yet. 定义：表示动作已经完成, 但对现在造成影 响; 或者表示从过去某一时间开始一 直延续到现在并还可能持续下去的动作。 现在完成时: Present Perfect Complete the following sentences. I _________ (be) in Beijing for two years. 2. I _____ never _____ (hear) of that man before. 3. Tom __________ (work) there since two years ago. 4. The twins ___________ (wash) the clothes for an hour. 5. He _________ (play) basketball since three years ago. 6. How long ____ Sally _____ (sing) yet? have been have heard has worked Exercise have washed has played has sung 1. 情态动词本身有一定的词义, 表示说话人的情绪、态度或语气, 但不能单独作谓语, 只能与其他动词构成谓语。 常见的有: can (could), may (might), must, need, shall (should), will (would)等。 2. 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。 个别情态动词有过去式形式, 可用来表达 更加客气、委婉的语气。 e.g. Ken can climb up the trees like a koala. Tracy could ride a bicycle when she was five years old. You mustn’t play with fire. It is dangerous. 情态动词 Translation. 1. 我们不能在教室里吃东西。 2. 首先你必须完成作业。 3. 他现在不可能在家。 4. 她一定知道这个问题的答案。 Exercise We can’t eat in the classroom.  You must finish your homework first. He can’t be at home now.  She must know the answer to this question. 4a Fill in the blanks with the correct forms of the verbs in brackets. Joe: _____ you ever ______ (take) part in an environmental project ? Eric: Yes, I have. I ______ (help) with a Clean-Up Day last year. It was __________ (consider) the biggest clean-up project this city ____ ever ____ (have). Have taken helped considered had had 参加 Joe: How many people ____ (take) part? Eric: I _____ (think) more than 1,000 people ______ (come) to help out. Joe: That’s fantastic! I guess everyone in this city is ______ (try) to improve the environment. Eric: Yes, we can’t afford to ____ (wait) any longer to take action! took think came trying wait v. 承担得起(后果); 买得起 electricity by turning off the lights when you leave a room. You ______ also use reusable bags instead of plastic bags. I think it’s a great idea that you now ______ pay for plastic bags in some stores. And instead of driving to school or work, you __________ ride your bike or walk. If it’s far, you __________ take the bus. All these could have to can/should can/could 关掉 adj.可重复使用的 付费;付出代价 small things ______ add up and become big things that _________ improve the environment. Let’s take action now! could would/can 采取行动 4c Make a list of things that people can do to help the environment and discuss your list with your partner. use public transportation (n.交通运输); … I think that everyone should use public transportation. I disagree. It’s difficult for parents with young children to use public transportation… Thank you for your attention! $$