介绍类英语作文结构【一】
1、说明的方法有：举例子,列数字,作比较,打比方等。
2、明白各种方法的作用。
举例子：这里使用了举例子的说明方法，具体说明了?? 作比较：这里拿?和?作比较，突出（具体）说明了?? 列数字：这里使用了列数字的说明方法，准确说明了??
例：1 “湖内有大小港岔200余条，半岛50多个，回水长10公里。”（列数字）
2 “即使人类不努力登上月球，包括信息技术在内的各种高科技也会得到发展，但发展速度要比现在慢很多。”（作比较）
3 “例如研究人类暴露在强辐射条件下的后果，寻找避免辐射对宇航员的血液造成危害的方法，使人们找到了治疗白血病、贫血等血液疾病的手段。”（举例子）
介绍类英语作文结构【二】
指发信人的姓名（单位名称）、地址和日期，一般写在信纸的右上角。一般公函或商业信函的信纸上都印有单位或公司的名称、地址、电话号码等，因此就只需在信头下面的右边写上写信日期就可以了。
英文地址的写法与中文完全不同，地址的名称按从小到大的顺序：第一行写门牌号码和街名；第二行写县、市、盛州、邮编、国名；然后再写日期。标点符号一般在每一行的末尾都不用，但在每一行的之间，该用的还要用，例如在写日期的时候。
日期的写法，如1997年7月30日，英文为：july 30，1997（最为普遍）；july 30th，1997；30th july，1997等。1997不可写成97。
介绍类英语作文结构【三】
信件如果有附件，可在信纸的左下角，注上encl：或enc：，例如：encl：2 photos（内附两张照片）。如果福建附件不止一项，应写成encl：或encs。
我们有时可看到在称呼与正文之间有re：或subject：（事由）字样。一般在信纸的中间，也可与“称呼”对齐。还应在底下加横线，以引起读信人的注意，使收信人便于在读信之前就可了解信中的主要内容。事由一般在公务信函中使用，也可以省略。
介绍类英语作文结构【四】
Dear Admission Committee:
Miss Pan Bei requested a letter of recommendation from me to support her application for graduate program at your university. As her teacher, I am pleased to comply with her request.
I first got to know Miss Pan when she enrolled at university and I was the assistant director of her class at that time. Being a professor for several years, I noticed that due to the lack of self-learning ability, it is really challenging for students, even those performing excellent in senior school, to keep up with the college speed. However, as a diligent girl without any solid background in Computer Science before college, she adapted quickly to the especially competitive environment in our department. At the end of the first year, she earned the 5th rank in her class, while ranking 1st among the girls. I was fairly impressed by her self-learning technique and exceptional efforts. Hence, I believe, goal-oriented, not afraid of inchoateness and with persistence, she has the quality to make achievements.
What distinguished her among her classmates, I think, was that she went far beyond acquiring excellent scores in the exams and instead got her range of knowledge enlarged. In spring, 2006, Miss Pan took the course I taught named Algebraic Structures and Combinatorial Mathematics. This inquisitive and assiduous young woman was sometimes the last to leave after my class, raising novel questions related to the subject. I found that she understood the knowledge in depth and detail. Furthermore, I still remember during the spring vocation in May, due to the break-down of my mail box, I missed her mails to discussing some questions. But the following week during the course time, she asked me directly. Her zeal for knowledge and the spirit to explore answers really leave me a deep impression. Finally, she was among the few students who got almost full marks in every test in class which showed her exceeding grasp of every chapter. Thus, I gave her 98/100 for the excellent performance in my course.
In summary, I have every reason to believe that Miss. Pan will make outstanding performance at your university as a graduate. I would appreciate greatly if you give her a favorable consideration. Please feel free to contact me directly if more assistance is needed. Faithfully yours,
Wanling Qu, Professor
Department of Computer Science and technology Peking University
Email: qwku.edu.cn
