在英语说明文和议论文中，单篇文章分析事物的原因比较常见，也是命题作文中的一种重要题型。这类题目作文要求考生对社会现象或社会问题进行解释，摆出原因。
基本结构如下：
P1: S1 Problem (general)
S2 Problem (specific)
P2: S3 Thesis
S4 Cause 1
S5 Detail 1/Detail
S6 Detail2/Cause2
S7 Cause 2/Detail
S8 Detail 1/Cause3
S9 Detail 2/Detail
P3: S10 Conclusion
句型如下：
S1: In the last few years/ recent years, there has been /China has experienced a dramatic increase/ growing tendency in the number of PCs/ the crime rate.
S2: According to a recent/new survey/ study/ research in 1998, the number/ percentage of students who…/ teenage smoking has almost doubled/tripled/ increased/jumped from 5% to 8%/ Decreased/0dropped by 5% as against/ compared with last year/ 10 years ago
S3: A number of/ Several factors/ causes might contribute to/ lead to/ account for the sudden rise/ phenomenon/ problem
S4: Part of the explanations for it/ One of the most common factors/ causes is that…
S5:
S6: … is also responsible for the problem./ Another contributing factor/cause is…
S7:
S8: Perhaps/ But the primary/ fundamental factor/ cause is that…
S9
S10: We might do more than identify the caused/factors. it is important to take action to…
The significance of … is far-reaching. it might exerts a profound influence on…
Models:
Why College Students Take a Part-time Job
1． 最近几年越来越多的大学生加入打工的队伍
2． 为什么大学生打工
3． 大学生打工的意义
(1)According to a recent survey, about 56 percent of Chinese college students held a part-time or temporary job in 2000, compared with nearly zero in 1990, and this figure may increases to 70 percent this year. (2)College students are working as tutors, salespersons, engineers and doing whatever work they can find.
(3)Why do they want odd jobs—jobs usually requiring little skill and knowledge? (4)The primary reason, I think, is money. (5)Feeling the financial pressure as books, movies and bus fares have all gone up in price, there is scarcely a young boy or girl who does not want to earn a little money to help cover the increasingly higher college costs, and at best save enough to traveling or buy things they have long desired. (6)In this way they hope to be financially independent and avoid the indignity of having to ask for money again and again. (7)Besides they want to gain some experience in the ways of society. (8)Students growing up from nursery school to college with realities. (9)Working on a part-time basis can provide them with a rare opportunity to know the outside world and prepare them for a future career.
(10)The significance of college students doing a part-time job means more than money and experience: It will broaden their outlook and exert a profound influence on their personality and life.
Children’s Schoolbags Are Getting Heavier
1. 现在学生背上的书包越来越重
2. 学生学业负担减轻不了的原因
3. 结论
(1)These days
责任编辑:yechenglu
