3).句子连接不正确
所谓句子连接不正确，就是两个独立的句子之间以逗号连接，这是不合英语语法的。正确的做法是以连词、分号、冒号、句号等连接两个句子。
不正确句: Breaking chalk into two pieces is a physical change, there is no change in the composition of the chalk.
正确句： Breaking chalk into two pieces is a physical change, so there is no change in the composition of the chalk.
II 高分表达
除了在句式上长短句相结合准确表达外，朗阁海外考试研究中心建议新托福考生要使用一些特殊的句式，以使句型多样化。句型多样化也是作文得到高分的条件之一。除了我们之前经常提到的高分句式，如倒装句、强调句、状语前置、插入语等，笔者还提出另外一个句式的多样变化，即主语多样化。下面笔者将列举几个句子概括介绍前面四种句型，而重点分析主语多样化。
正常句： Luck only works in extreme cases.
倒装句： Only in extreme cases does luck work.(否定词位于句首的倒装。)
正常句： The internet provides people access to the latest information.
强调句： It is the internet that provides people access to the latest information. (强调the internet)
正常句： The environment has been deteriorating severely along with the development of industry.
状语前置句： Along with the accelerating development of industry, the environment has been deteriorating severely.
正常句： However, new zoos try to duplicate animals’ natural habitats as much as possible and give animals a comfortable amount of space.
插入语： New zoos, however, try to duplicate animals’ natural habitats as much as possible and give animals a comfortable amount of space. (连词however做插入语)
主语多样
1. 她突然想到了一个主意。
She suddenly had an idea.
通常情况下，考生会马上对这句话进行翻译，基本不会动句子结构。但是以人作为主语的英语句子总是不能够很吸引人，所以这个句子如果稍微做下修改，以后面的宾语“主意”做主语，这个句子会发生一些变化。
An idea suddenly occurred to her.
2. 他开车心不在焉，几乎闯祸。
He was absent-minded when driving, and almost caused an accident.
这句话依然是拿人做主语，稍微改一下，把心不在焉这个形容词的名词形式做主语，会大不相同。
His absence of mind during driving nearly caused an accident.
3. 美利坚合众国创立于1789年。
The United States of America was founded in 1789.
这句话没有任何错误，但是不够多样，可以用时间作主语。
The year 1789 witnessed the founding of the United States of America.
III 实用句型
在文章的最后，朗阁海外考试研究中心为大家列举几个新托福考试中可以使用的套用句型，为一些写句子摸不着头绪的考生提供帮助。
1. It pays to make great efforts to prepare for TOEFL-ibt.
努力准备新托福考试是值得的。
2. Nothing is more important than to receive education.
没有比接受教育更重要的了。
3. The reason why the white-collars suffer increasing work-related stress is that they pursue work achievement in career.
白领压力日益增加的原因是他们在事业上有所追求。
4. It is time the related department took proper measures.
(虚拟句式)相关部门早该采取适当的措施了。
以上是托福写作教你怎样造句的内容，一篇好的文章是由一个个句子堆砌起来的，每一句话都是这篇文章的重点我们万万不可忽视，在这里面不仅仅体现了考生的语法用词，还能体现考生对于题目的思路看法，以及对美国地道用语的运用。
