说明文：在四级作文中，实际上细化为原因类作文，最明显的原因类作文，如My Favorite Programme, My Ideal Job, The Career I Pursue, 再就是Why I Take the College English Test Band 6。
inner peace模板一：
Why Are There so Many Rural Laborers in Big Cities?
1. 近来来越来越多的民工涌入大城市。
2. 产生这一社会现象的原因。
For a number of years, there has been a steady ri in the number of rural laborers who flood into big cities. Many men work on construction sites, while many women work as dishwashers in restaurants or babysitters for city dwellers. Three reasons, in my mind, can account for this social phenomenon.
First and Foremost, the limited land can no longer produce enough crops for an ever-incre
asing rural population. In the cond place,hll是什么意思 there are far more opportunities in big cities----rural laborers dream of earning money through hard work. Last but by no means the least, many of them want to live permanently in big cities, becau they admire the way of living there, and wish their children to receive good education.
I firmly believe that if we try our best to create a healthy social atmosphere, rural laborers will make greater contribution to our nation.
结构点评
这篇作文谈论的是一种社会现象。第一段分三句，首句引入大量农民工进入大城市这一现象，第二句举例子进行说明，第三句是个过渡，引起解释原因的段落。第二段分三个方面来解释原因。第三段是乘法的结束语。这是我们大家熟悉的结构。
妙笔生花
第一段首句是个经典句型，大家应熟记。第二句是举例说明，construction site 表示“建筑工地”，babysitter表示“帮人看孩子的人”。第三句使用了插入语，强调了句子主语。
第二段分三个方面来解释这一社会现象。第一点中no longer 和ever-increasing的使用突显了矛盾，其中rural指“乡村的”。第二点中的far more 亦可用much more，后使用破折号，引出进一步的说明。第三点中permanently 和admire 分别指“永久地”和“羡慕”，接受教育是“receive education”。
第三段非常简洁，是宾语从句嵌套条件状语从句的情形。条件状语从句的语气平和舒缓，显得非常客观。
模板二：
端午节的由来和风俗简介还有些题目也是原因类题型，像It Pays to Be Honest, Harmfulness of Fake Commodities, Don’t Hesitate to Say “NO”. might的用法这些都是从写现象-----原因------后果的三段论式。
今天我们练习写，主题句已经给出：It Pays to Be Honest
1当前社会上存在许多不诚实的现象
郑州电脑学校2诚实利人利己，做人应该诚实
Nowadays, every one of us has been confronted with too many instances of dishonesty either through the mass media or in daily life………….We can’t help asking ourlves: What is wrong with our society? Is honesty going out of style?
Honest should and would never go out of style. For any individual, honesty ……
All that has been discusd above points out an undeniable fact that it pays to be honest. Honesty ……..
汗译英模板三
Video Games
The recent years have witnesd表明，目击 an unfavorable social phenomenon—more and more college students become indulged迷恋 in video games. Some of them play video games overnight, which will inevitably hinder妨碍 their study. Others even play truant逃避 to enjoy themlves.
After contemplating沉思 and meditation沉思, we can find three possible reasons to account for this trend. First of all, the information technology is developing at a fantastic speed and video games become more and more advanced and attractive. What’s more,政治局候补委员 many students lack lf-control to such an extent that they play for long hours even if they know it is harmful to both their mental and physical health. In the third place, the university authority and the teachers are too lenient 仁慈with the students—they attach great importance to imparting传递 knowledge and more or less overlook students’ personality development.
勺子的英文The solutions to this problem em more than clear on this occasion. By creating a favorable environment, university authority can help students enjoy learning in and after class. Moreover, university teachers should teach students how to make best u of their time and energy to realize their dreams. Last but by no means least, the mass media should also play a positive role in conveying the message that it is not wi at all for college students to play video games, especially for long hours.
rmb是什么意思
It is quite natural that we meet such problems among college students. As long as the government, universities and students make joint efforts, a sound solution is not far away.
第一段引入了越来越多的学生沉迷于电子游戏这一社会现象。
第二段从三个方面阐述了此现象的原因。（注意三个方面的英语表达）
yira
第三段从学校、老师和媒体三个角度（注意另外三种英语表达）来阐述解决问题的办法。未段包含两句，第一句说问题常见，第二句说只要大家同心协力，必能找到解决问题的办法。
