2)接连句
所谓接连据，就是两个句子直接连在一起，既未使用连词，也未使用正确的标点符号。
接连句:Professionals such as lawyers or accountants usually work longer hours than factory workers they have greater freedom in planning their time.
正确句一:Professionals such as lawyers or accountants usually work longer hours than factory workers. However, they have greater freedom in planning their time.
正确句二:Professionals such as lawyers or accountants usually work longer hours than factory workers; however, they have greater freedom in planning their time.
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，新东方托福考试网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)