2017年高考英语三轮复习 书面表达之说明文课件

　　1．说明文是以说明为主要表达方式，用简洁明了的语言来解释说明事物，阐明事理，从而给读者提供知识的一种文体。 2．在高考书面表达中，其主要命题形式为图表式作文，有时也以图画式和提纲式作文来呈现写作材料。 3．它要求语言简明扼要，通俗易懂，说明过程讲究层次性和条理性。 4．这种文体通常用第三人称，时态以一般现在时为主。 【常用素材】 一、结构模板 _____is a most effective _____to ____(点明要介绍事物的必要性)． For most people, it's almost impossible to___(介绍某事物对多数人的重要意义). _____is really _____(该事物的优势或显著特点)．With the functions of _____， it enables us to_____(该事物的作用)．It can even _____(进一步说明该事物的作用)．Just imagine, all this can be done with_____(说明该事物的重要性)． A convenient tool can certainly ____， but it doesn't always help____(承上启下，介绍事物的另一方面)．Too much _____(该事物的负面影响一). Too many _____(该事物的负面影响二) .Relying too much on ______makes_____(总结说明过分使用该物品给我们带来的负面影响)．

　　二、必备句型 1. It plays an increasingly important role in life. 2. It is of great benefit to us. 3. It has more disadvantages than advantages. 4. Some changes have taken place in the past five years. 5. This is a phenomenon that many people are interested in. 6．From what has been mentioned above, we can come to the conclusion that... 7. Last but not least, more and more people prefer to enjoy modern life. 8. We have good reasons to believe that... 9. However, everything divides into two. 10. Therefore, we must take some effective measures to solve it. [写作要求] (2010年高考湖北卷)请你根据以下提示，结合生活中的一个事例，用英语写一篇短文，谈谈微笑的作用。 The best example of universally understood body language may be the smile.A smile can help us get through difficult situations and find friends in a world of strangers.A smile can open doors and tear down walls. 注意：(1)无须写标题；

　　(2)内容只需涉及一个方面；

　　(3)词数为100左右。 ___________________________ [佳作背诵] No body language can be more attractive/ fascinating than smiling.Not only can a beautiful smile make ourselves happy, but also it enables others to feel delighted.Sometimes when a smile is so powerful that it gives people suffering from disasters great courage. A little boy named Lang Zheng, for instance, impressed and encouraged a great many people when a serious earthquake happened in Wen Chuan/over took Wen Chuan.Right after he was rescued by the soldiers from the ruins, he saluted and smiled to them.His smile was like sunshine which warmed people who were in sadness. It is safe/ no exaggeration to say that without smile our life would be colorless and difficult.It is suggested that we smile as much as possible.