修正:She tries many ways to improve her looks.
修正:There are some reasons why she tries to improve her looks。
1.3 、如何写好主题句中心思想
主题句由两部分组成,即主题(topic)和中心思想(controlling idea)。中心思想作用是导向(control)和制约(limit)。我们前面谈到关键词就反映了中心思想。所谓导向就是规定段落发展脉络,所谓制约就是限制主题覆盖范围,两者不可分割。没有导向,内容就会离题或偏题;没有制约,内容就可能超出一个段落所能容纳范围。对于初学写作人来说,导向重要性容易理解,但如果由他们自己来构思一个主题句,就可能忽视制约这一面。例如:
There are two ways in which one can own a book. The first is the property right you establish by paying for it, just as you have made it a part of yourself and the best way to make yourself a part of it is by writing in it.
本段主题句如果没有in which 引出定语从句,那么two ways 不仅不能起制约作用,而且也不能起导向作用,句子本身读起来也就使人觉得欠缺点什么。
Exercise is beneficial to your heart. A 22-year study was conducted by doctors in California. They found that people who work at physical jobs experience fewer heart attacks than other people. These active people work all the time at moderate speeds, their daily routine gives them an adequate amount of exercise and helps them stay in shape.
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