一、准确的句子表达
1. 句型分析
英语的句型包括以下几种，简单句、复合句、并列句、并列复合句等。在新托福写作中，一般使用复合句，辅以并列句和并列复合句，当然肯定要有简单句，做到长短句相结合。下面摘抄几个句子给大家认识并分析一下复合句和并列复合句。
a. Even though I usually know what I have to say, I cannot always express myself correctly in English.
这句话是一个复合句，由even though引导的让步状语从句。
b. This challenges me to practice my spoken English, with the result that I can complete the speaking tasks more fluently and quickly.
这句是一个复合句。with介词结构中，有一个that引导的同位语从句对result进行解释说明。
c. I think this is less than ideal because any differences in opinion become personal conflicts, and therefore that might jeopardize the employee's job.
托福写作辅导指出上句话是一个并列复杂句。and 连接了两个句子，是一个并列句;because引导的原因状语从句。
d. Shallow writing is indicative of weak critical-thinking skills, and such writing, which is often described as "sophomoric", receives low mark.
这句话同样是并列复杂句。由and连接两个句子，成为并列句，再一个which引导的定语从句。
2. 有问题的托福写作句子的列举
托福写作中的句子容易出现三个问题：一是使用破碎句，二是使用接连句，三是句子连接不正确。
1). 破碎句
所谓破碎句，就是句子不完整，通常是没有谓语(或者说谓语是动词的非谓语形式，如分词)，或者是从句单独成句。
破碎句：She singing alone. (无谓语，singing是现在分词)
正确句：She is singing alone.
破碎句：He did not come. Because he was sick. (从句单独成句)
正确句：He did not come because he was sick.
2).接连句
所谓连接句，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 thanfactory workers. However, they have greater freedom in planning their time.
正确句二: Professionals such as lawyers or accountants usually work longer hours thanfactory workers; however, they have greater freedom in planning their time.
3).句子连接不正确
所谓托福写作句子连接不正确，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 thecomposition of the chalk.
正确句：Breaking chalk into two pieces is a physical change, so there is no change in thecomposition of the chalk.
