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课件网) Module 12 Module 12 Help Unit 3 Language in use To summarise and consolidate the use of modal verbs — must, can, could (for prediction). To write instructions on self-protection in disasters or accidents. That _____ (可能) be harmful! Betty, you _____ (一定) know! _____ _____ _____ (远离) windows and heavy furniture. 4. _____ _____ _____ _____ (不要站在……附近) street lights or under power lines. Stay away from must could Do not stand near 根据汉语提示补全句子，每空一词。 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. 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： 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. 祈使句 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. 祈使句 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! 祈使句 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？ 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”。 情态动词must, can, could表示推测 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。 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. must mustn’t could mustn’t must Complete the sentences with could, must or mustn't. 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. Underline the correct words to complete the first aid instructions. 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. _____ the building quickly when the ground stops shaking. 5. _____ calm. Stay away Hide under Do not use Leave Keep Complete the poster about earthquakes with the correct form of the words and expressions in the b ... ...
