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课件网) Module 12 Unit 3 Language in use Grammar Free Talk Can you guess what's matter with the boy He must/could ... What can we do to help him 1 2 能掌握情态动词must, can, could表示推测 和祈使句的用法。 能正确运用情态动词must, can, could和 祈使句谈论急救的简单说明。 目标一:掌握情态动词must, can, could表示推测和祈使句的用法 Activity 1 Read the following sentences first and put them into Chinese, then talk about them in groups. 1. That could be harmful! 2. Betty, you must know! 3. Stay away from windows and heavy furniture. 4. Do not stand near street lights or under power lines. Group Discussion 小组合作观察每个句子的谓语构成, 讨论、总结并分组展示。 Task 1: 结合不同的句式并查阅相关资料，探究总结情态动词 must/can/could表推测的句式及其可能性大小; Task 2: 查阅相关资料探究总结祈使句的含义、特征、常见的 句型和祈使句的否定句。 1. That could be harmful! 2. Betty, you must know! 3. Stay away from windows and heavy furniture. 4. Do not stand near street lights or under power lines. Activity 2 每个小组派代表总结发言。 1 组 2 组 3 组 4 组 Activity 3 Summary 1 情态动词 must/can/could 表示推测 e.g. Betty, you must know! It can’t be my brother. He is still in France. 1.can 和 could 表示对现在或将来的推测, 意为“会, 可能”, 但 can 表示推测时, 往往用于否定句和疑问句。 用于疑问句时, can 比 could 表示的“可能性”要大; 用于否定句时, cannot (can't)表示“不可能”. 2.must 也可以表示猜测, 意思为“一定, 准是”, 通常只用于肯定句。 Summary 2 祈使句 1.含 义 祈使句表达说话人对对方的叮嘱、劝告、 希望、禁止 、建议、请求或命令等。 2.基本特征 一般以动词原形开头； 无时态和数的变化； 祈使句的常见句型 (1) 实义动词型: 实义动词(+宾语+其他). Stop now! 停下来！ Keep clear of fires. 不要接触火。 (2) be动词型: Be +表语(+其他). Be brave! 勇敢些！ (3) let型: Let +宾语+动词原形(+其他). Let Lingling have another try. 让玲玲再试一试。 (4) No+v-ing / 名词. No fishing. 禁止钓鱼。 No photos! 不准拍照。 (1) Don’t +动词原形(+其他). Don’t be late for school.上学不要迟到。 Don’t eat in the classroom. 不要在教室里吃东西。 (2) let型祈使句的否定形式 ①Don’t + let +宾语+动词原形(+其他). Don’t let the children wait any longer. 不要让孩子们再等了。 ②Let +宾语+not +动词原形(+其他). Let’s not tell the news to Daming now. 我们现在先不要把这个消息告诉大明。 祈使句的否定句 目标二:正确运用情态动词must, can, could和祈使句谈论急救的简单说明 Activity 1 1 Complete the sentences with could, must or mustn't. 1. It is dangerous. You _____ keep out! 2. These stairs are not safe. You _____ use them. 3. The rocks are falling down. You _____ get hit. 4. The river is too deep. You _____ swim in it. 5. Betty _____ know what to do because she did some basic medical training. must mustn't could mustn't must 2 Underline the correct words to complete the first aid instructions. 1. Get / Do not get medical help immediately. 2. Ask / Do not ask them where the pain is. 3. Lift / Do not lift them because you may drop them. 4. Keep / Do not keep them warm ... ...
