Unit 3 Language in use 【教学目标】 To use the points in Units 1 and 2. To make Ss learn about the accidents and how to deal with the harmful accidents to save their lives. 【教学重点】 To master the words, the imperative sentence. To use can/could/must to tell the possibility. 【教学难点】 The using of can/could/must 【教学方法】 PWP method, Formal and interactive practice 【教学手段】 A tape recorder, multimedia and some pictures 【教学过程】 Teaching Procedures: Step 1 Revision and Warming up Look at the pictures and fill in the blanks. Step 2 Language practice Master the grammar by filling in the blanks. That _____ be harmful! Betty, you _____ know! _____ _____ from windows and heavy furniture. _____ _____ _____ street lights or under power lines. Step 3 Grammar 祈使句 表达说话人的叮嘱、劝告、希望、禁止、建议、请求或命令等。一般以动词原形开头，无时态和数的变化。 1. 动词原形构成的祈使句 e.g. 祝你度过美好的一天！ 别浪费时间了！ 请走这边。 确保他不受凉。 Have a nice day! Don’t waste your time！ Come this way, please. Make sure he’s warm. 2. let’s 构成的祈使句（提出建议） e.g. 这周咱们到乡下度周末吧。 我们坐出租车好吗？ Let’s spend this weekend in the countryside. Let’s take a taxi, shall we 3. 无动词祈使句（请求、命令、口号等） e.g. 请稍等！ 请这边走！ Just a minute, please! This way, please! 情态动词must, can, could表示推测 can/could 可以表示对现在或将来的推测，“会，可能”。can表推测是，常用于否定句和疑问句。否定句中，cannot表示“不可能”。 e.g. 你不是认真的吧！ You can’t be serious! could可用于肯定句、否定句和疑问句。 e.g. 他可能很疼。 那可能有害！ 这有可能是真的吗？ He could be in pain. That could be harmful! Can/Could this be true must可表推测，“一定；准是”，只用于肯定句。 e.g. 是谁送来的礼物啊？会是你哥哥吗？（询问可能性） 肯定是你哥哥，我刚才看见他在你的 房间里。（语气强烈，很肯定） 不可能是我哥哥，他还在法国呢。（表不可能） Who sent the present Can it be your brother It must be your brother. I saw him in your room just now. It can’t be my brother. He is still in France. Step 4 Practice 1. Complete the sentences with could, must or mustn’t Read the sentences carefully. Fill in the blanks, but you need to use some of the words more than once. 1. It’s 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. 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. 3. Complete the poster Fill in the blanks in the poster about earthquake with the correct form of the words and expressions from the box. do not use, hide under, keep, leave, stay away When there is an earthquake ... 1. _____ from the windows. 2. _____ a table. 3. _____ the lift. 4. _____ t ... ...
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