Unit 13 Section A(grammar-4c)课件 2023-2024学年人教版九年级英语全册

Unit 13 We’re trying to save the earth. Section A (grammar-4c) To review the use of Present progressive, used to, Passive voice, Present perfect and Modal verbs. To master them by doing some exercises. 不同种类的污染 2. 河底 3. 把垃圾扔到河里 4. 在……中起作用 5. 在中国南部 6. 对……有害 7. 在……顶部 8. 海洋生态系统 different kinds of pollution the bottom of the river throw rubbish into the river play a part in I. Check if you remember these phrases. in southern China be harmful to at the top of… the ocean’s ecosystem II. Translation. 1. 这不仅残酷还对环境有害。 This is not only cruel, but also harmful to the environment. 2. 鲨鱼处于海洋食物链的顶部。 3. 许多人相信鱼翅对健康有好处。 Sharks are at the top of the food chain in the ocean’s ecosystem. A lot of people believe that shark fins are good for health. We are try 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 sharks fins are good for health. Present perferct We should save the sharks. Model verbs Grammar Focus 现在进行时: Present progressive 结构: be (am/is/are) + v.-ing形式 标志词：Look, Listen, now, right now… e.g. Listen! The boy is singing. It’s always raining here. (抱怨情绪) 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，或说话者的强烈情感。 v.-ing形式(现在分词)的构成： a. 一般情况下在动词词尾加-ing。 b. 以不发音的e结尾的动词，去掉e加-ing。 c. 以一个辅音字母结尾的重读闭音节，双写最后一个字母，再加-ing。 used to do sth. 过去常常做某事(而现在不做了) 1) 否定句式：didn’t use to do sth. 2) 一般疑问句式：Did + 主语 + use to do sth.? 3) 附加疑问句式： …, didn’t +主语? e.g. He used to eat shark fin soup. He didn’t use to eat shark fin soup. He used to eat shark fin soup, didn’t he? used to do & be used to doing be used to (doing) sth. 习惯于(做)某事 e.g. I’m used to walking to school now. 我现在习惯步行去学校。 The city is hot and wet and I have been used to it. 这座城市又热又潮湿，而我已经习惯了这里。 Let’s review. 被动语态表意功能 讲话者不知道动作的执行者，不必或不便说出动作的执行者（这时可省掉by引导的短语） 借助被动的动作突出动作的承受者 为了更好的安排句子，用于修辞 当动作的执行者是无生命的事物时，需用被动语态 用法 有些动词习惯被动语态，如born, report, say等 10 Let’s review. 被动语态