一、段落基本句型构造

　　1.概述现象段
　　概述现象段通常出现在说明现象类作文的第一段， 其基本的句型构造是：先用一句话概括现象的总体情况，这是段落的主题句；然后具体描述现象的突出表现或具体变化，以支持主题句。

　　例
　　Directions : For this part , you are allowed 30 minutes to write an essay entitled Digital Age . You should write at least 120 words following the outline given below in Chinese :
　　1.如今数字化产品得到了越来越广泛的使用，举例说明。
　　2.数字化产品的使用对人们工作、学习和生活产生的影响。

　　第一段：概述现象段
　　(1) Nowadays , digital products are extremely popular and play a very critical role in modern society . (2) Taking a look around , you can find too numerous examples to mention individually , and the best one may be the computers .(3) In addition , other digital products , like digital camera , digital TVs , etc . , have gradually become indispensable parts of our life .