托福写作的独立写作部分，要求的写作能力比较高，能拿高分的同学通常对各种话题均有广泛涉猎，独立写作要求考生懂得议论文写作的基本概念、框架结构以及逻辑衔接，涉及的论证方法有：举例、原因、结果、对比、假设、解释说明、数据支撑等。

　　下面，朗阁海外考试研究中心的老师将以“对比论证”为例，为大家介绍一些学习方法：
 

　　今昔对比题应该是托福独立写作考试中的重点题型之一，TPO以及历年真题中都会出现很多这种题型的题目，通常会拿现在与过去进行比较，也会存在与将来进行比较。遇见这种题型的时候，考生可以用到时间对比的概念来论证解题。比如，我们可以看一看TPO上面的两道今昔对比考题。

　　TPO 34:

　　Do you agree or disagree with the following statement?

　　Educating children is a more difficult task today than it was in the past because they spend so much time on cell phone, online games, and social networking Web site. Use specific reasons and examples to support your answer.

　　本题考的是现在教育孩子是不是比过去更难了，因为他们花大量时间在手机、网络游戏和社交网站上面。选择同意或者不同意都比较好回答，我们可以从学生、老师、科技等不同角度从过去到现在的变化来分析这道独立写作题。
 

　　To start with, history has seen a big leap in scientific development, which means teachers have to teach more knowledge to meet the standard of society. Children in ancient time learned only a few courses such as literature and masterpieces of some oracles. On the contrary, teachers have to teach students knowledge of all aspects such as physics, mathematics, chemistry, economics, etc. As the saying goes, “one person has to study hard for ten years”. Students nowadays take more than ten years to get education. So the more knowledge is, the more difficult it is to educate children.

　　从老师的角度来分析为什么教育孩子变难了，因为他们教的知识变多了。然后再从过去只需要教学生很少的课程与现在要教授学生各种各样的科目进行对比，再从过去只要寒窗苦读十年与现在要学习不止十年这样的长度进行对比。
 

　　What’s more, students in ancient time were more respectful to their teachers. Students were supposed to have good manners and obey whatever teaches say. Teachers could punish students if they did something wrong. But the fact is just the opposite currently. Students don’t respect their teachers as much as it is in the past or just obey them for fear. For instance, some students say something bad about their teachers for being punished or criticized. What’s even worse, I know some students knock at their teachers, which is unbelievable in ancient times. It is harder and harder for teachers to get students controlled.

　　从学生的角度来分析，为什么教育孩子变难了，因为学生自身特点发生了变化，学生不再像以前那样尊重老师了。以前的学生比较有礼貌，而且比较尊师重道，甚至老师可以惩罚学生。然而现在的学生因为受父母溺爱，不但不尊重老师，而且甚至会辱骂殴打老师，这让教育变得更加困难了。也是用时间对比概念很好地论述了中心论点。
 

　　对这道独立写作例题已经消化了解同学，请点击→这里 继续学习下节内容~

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