初三 unit13A-2课件.pptVIP

Unit 13 Were trying to save the earth!;Section A 2d-4c;As we all know, the earth is in trouble. And what should we do to save the earth?;Turn off the lights when you leave a room…;It’s a cool handbag, isn’t it? And it’s very special because it can be reused. Reusing something old is also a way to save the earth…;;Yeah, or ride a bike. There are other advantages (优点) of bike riding. It’s good for health and it doesn’t cost (花费) anything!;Great ideas! What about waste pollution?;And remember to throw rubbish in the bins and keep public places clean and beautiful for everyone.;2d;4c. Let’s Make a poster now !;Pay attention to the sentences. 1. We’re trying to save the earth. 2. The river used to be so clean. 3. The air is badly polluted. 4. No scientific studies have shown that shark fins are good for health. 5. We should help save the sharks.;现在进行时: Present Progressive;What a fine day today! Look! What are they doing?;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.;Translation. 1. 她过去常常周末和朋友闲逛。 She used to hang out with friends on weekends. 2. 他习惯于每天晚上睡得很晚。 He is used to staying up.;被动语态：Passive voice;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。;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.;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?;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