二、说明文一 说明原因类说明文1.技法点拨2．句式积累(1)描述现象常用语The Internet has been playing an increasingly important role in our daily life. It has brought a lot of benefits but has created some serious problems as well.互联网在我们的生活中起到了越来越重要的作用，它带来了很多便利，但也引发了很多问题。There is no denying that there are a variety of festivals during a year in China. Among them the Spring Festival stands out. It is a symbol of unity and harmony.毋庸置疑，中国一年内有很多节日。其中春节尤为重要，意味着团聚与祥和。(2)分析原因常用语The reasons for taking part in the voluntary work are as follows.参加志愿服务的原因如下。The reason why I recommend this to you is that it helps you have a better understanding of Chinese culture.我推荐这个给你的原因是为了让你更好地了解中华文化。(3)表达观点常用语As far as I'm concerned, we should take good care of the pocket money we have and not waste it on useless things.就我个人而言，我们应该保管好自己的零花钱，不要浪费在无用的东西上。As a proverb says, all work and no play makes Jack a dull boy.正如谚语所说，只学习不玩耍聪明的孩子也变傻。It is obvious that hard work leads to success.不言而喻，成功源于勤奋。As you can see, great changes have taken place in our school these years.正如你们所见，我们学校这些年来发生了很大变化。We are in favor of the idea that taking public transportation instead of driving a car to and from work is beneficial to the environment.我们赞成这个观点：乘公共交通而不是开车上下班对环境有利。3．经典例文(2020·安徽省六安市毛坦厂中学东城校区高三模拟)众所周知，课堂是每个学生实现梦想的地方，然而，有一部分同学没有很好地利用它。请以 How should we make good use of classes？为题， 写一篇文章，应包含以下要点：1．简要说明课堂的意义；2．目前课堂中存在的主要问题；3．分析原因并提出建议。注意：1.可根据内容需要适当拓展，以使行文连贯；2....
