(
课件网) Unit 13 We’re trying to save the earth! Section A Grammar Focus~4c 学习目标 1 2 在语境中理解、识记并运用本课时词汇：take part in, afford, turn off, reusable, pay for, take action等； 正确区分和使用以下语法结构：现在进行时、used to、被动语态、现在完成时、情态动词。 It is suffering from pollution. What’s happening to the earth 新课讲授 The river used to be clean. However, it is badly polluted. Even the bottom of the river was full of rubbish. What caused the water pollution ？ People are throwing rubbish to the river. Factories are putting waste into the river. What should we do to save the earth The government has taken actions. Some laws are developed to stop the pollution. Everyone should take part in saving the earth. 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 Grammar Focus 1.什么时候用现在进行时？ 2.现在进行时的结构是什么？ 3.现在进行时的标志性词语有哪些？ 4.现在分词的构成规则有哪些？ 1.Be quite, please. The baby is sleeping. 2.Look! Kenny is swimming happily in the pool. 3.Now people are taking action animals. Let's join them. 4.Listen to carefully please. I am talking about something very important. 现在进行时: Present progressive 现在进行时 基本 结构 基本 用法 标志词 be (am, is, are) + v.-ing 说话瞬间正在进行或发生的动作 现阶段或当前一段时间之内正在进行的动作 now, look, listen, right now等 动词-ing形式的构成 一般情况下，在动词词尾后加-ing。如：go → going 以不发音的e结尾的动词，去掉e加 -ing。如: have → having 以重读闭音节结尾的动词，末尾只有一个辅音字母，双写这个辅音字母，再加 -ing。 如：stop → stopping Practice 1. Look! Some old people _____ in the park. A. sings B. sing C. are singing 2. —Don’t make noise! The children _____online. —Sorry, I won’t. A. studies B. are studying C. studied D. were studying 3. —Peter, what are you doing —Oh, I _____ a report about national heroes. A. will write B. am writing C. wrote D. have written 1. used to 表示什么意思？后接什么？ 2.used to 句型的否定句和一般疑问句的形式是什么？ 3.used to 和 be used to 的区别？ 1. James used to wake up late, but now he gets up very early. 2. Did Cherry use to live in Shanghai when she was a child used to do & be used to doing 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 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。 used to do & be used to doing Practice 1.You used _____ (go) to school by bike，didn't you 2. ... ...
