Module 12 Help Unit 3 Language in use 教案

Module 12 Help Unit 3 Language in use 【教学目标】 1. To summarise and consolidate the use of modal verbs—must, can, could (for prediction) 2. To write instructions on self-protection in disasters or accidents 【教学重点】 1. To master the words, the imperative sentence. 2. To use can/could/must to tell the possibility. 【教学难点】 The using of can/could/must 【教学过程】Teaching Procedures Step 1 Language practice 根据汉语提示补全句子。 That _____ (可能) be harmful! Betty, you _____ (一定) know! _____ _____ _____ (远离) windows and heavy furniture. _____ _____ _____ (不要站在……附近) street lights or under power lines. Step 2 Grammar 祈使句 祈使句用来表示叮嘱、劝告、希望、禁止、建议、请求或命令等。它的常见句型有以下两种： 一、肯定式句型 1. Do型: 行为动词原形(+ 宾语 + 其他)。 如: Come in, please. = Please come in. 注意：please既可放在句末，也可放在句首。放在句末时，其前通常加逗号；放在句首时，它与动词原形之间不用逗号。 2. Be型: Be + 表语 (+ 其他)。 如：Be quick! Be a nice man! 3. Let型: Let + 宾语 + 动词原形 (+ 其他)。 如：Let me have a try. Let's go for a picnic. 二、否定式句型 1. Do型和Be型的否定式都是在句首加Don’t。 如: Don't talk in class. Don't be sad. 2. Let型的否定式有两种：“Don’t +let+宾语+动词原形(+其他)”或“Let+宾语+not+动词原形(+其他)”。 如：Don't let them make noise in the library. Let her not read in bed. 3. 在公共场所常常会见到一些警示语，其结构分别为“No+动词-ing形式”或“No+名词”。这些祈使句一般表示“禁止”或“规劝”的含义，用于警示人们不许做某事。 如：No parking! No photos! 情态动词must, can, could表示推测 我们学过情态动词can和could表示“能够，可以”等意义的用法。can和could还可以表示对现在或将来的推测, 意为“会, 可能”。 can表示推测时，常用于否定句或疑问句中。 用于疑问句时，can比could表示的“可能性”要大; 用于否定句时，can’t (cannot) 意为 “不可能”。 e.g. You can’t be serious! 你不是认真的吧？ could表示推测时, 可用于肯定句、否定句和疑问句。 e.g. He could be in pain. 他可能很疼。 That could be harmful! 那可能有害！ Can/Could this be true 这有可能是真的吗？ 情态动词must也可以表示猜测，意为“一定，准是”，通常只用于肯定句。 Betty, you must know! 贝蒂，你肯定知道。 Step 4 Practice 1. Complete the sentences with could, must or mustn’t 1) Read the sentences carefully. 2) 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. Keys: 1) must 2) mustn’t 3) could 4) mustn’t 5) 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. Keys: 1) Get 2) Ask 3) Do not lift 4) Keep 3. Complete the poster about earthquake with the correct form of the words and expr ... ...