托福写作考试分为综合写作和独立写作，其中独立写作最有难度，原因可能就是难在开头部分了。那么托福独立写作的开头要如何去写呢?这里总结了利用“定义法”三步快速搞定托福独立写作开关，希望可以帮助到大家。

　　开头部分困扰大部分考生。很多考生会报怨没有思路，不知道从哪下笔。所以用 I agree 或 I disagree…一句话引出自己立场来搞定开头的同学不在少数。有的同学怕写不好，甚至不敢轻易写开头。其实大可不必多虑，毕竟托福写作风格以议论文为主，也就是说开头表达好自己的立场就够了，所以建议：背景铺垫+个人立场。

　　对于开头的构思，我们可以直接套用模板，加入自己的观点。比如模版开头一：

　　when it comes to the topic that…, opinions of the public are of great variety. Admittedly, some people would claim that….. However, I still insist that… My reasons will be listed as follows.

　　又比如在涉及到A和B两个对象的影响类的题目里，常见模版开头二：

　　Nowadays, the influence of A on B is a matter for debate for a long time. some people claim that… However, I disagree with them. In my viewpoint, … and the following is my reasons.

　　模版可以用，但不建议同学们直接拿来就套上，一是语言显得呆板，二是托福官方对模版的态度为“不扣分，不加分”。因此想要高分的同学们，模板还是少用的好。最好的开头，还是同学们通过自己思考得来的。今天我们一起看下常见的开头破冰法之一：定义法引入。所谓“定义法”，就是下定义，对题目中的某些名词或概念进行解释，如题中所涉及的 success, responsibility, independence,social skills，part-time jobs 等，我们可以直接解释其定义及大家对它的看法，还可以涉及到它的重要性或影响等词，比如 importance, benefits, advantageous,exe rt positive/negative influence on，一句话带过即可。下面我们结合具体题目带入“定义法引入”的具体应用。

　　例如：D/A: One ofthe best ways that parents can help their teenager children prepare for adult life is to encourage them to take a part-time job.

　　在道题中，涉及的名词有parents, teenager children, adult life, 和a part-time job四个名词及词组，也就是说这个题目我们可以从四个角度进行开头段的构思。不过我们应先从最好把握的入手。不难发现，a part-time job属于话题的关键词，所以[第一步]我们可直接针对a part-timejob进行解释，如 Part-time jobs, which act as a warm-up for the future career, can provide children with a general image of the society. 或 Part-time jobs is of great importance in helping children better understand the society they are live in.

　　定义法解释过之后，[第二步]我们要引出题中的其它对象，最后再引出自己立场。如上边紧接着 a part-time job 这句可以写 For most parents, it is really an ideal choice to help their children prepare for adult life.[第三步]在点明观点时，我们要，Thus I agree with the opinion in the statement.甚至最后可以加一句，比如：my reasons will be detailed as follows. 或者my reasons are as follows.

　　这时我们的开头段已经基本搞定：

　　Part-time jobs, which act as a warm-up for the future career, can provide children with ageneral image of the society.For most parents, it is really an ideal choice to help their children prepare for adult life.Thus I agree with the opinion in the statement. My reasons will be detailed as follows.

　　这个题目还涉及到其它三个对象，也就是说，我们还可以根据上边定义法的思路以其它三种方式引出该话题，见下文供大家参考: