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沪外教七下Unit4写作精讲
A Description of an Engineering Wonder
适用水平：七年级下册
字数要求：60—100词
教材依据：Unit 4 工程奇迹描写 + although/though 语法 + 提纲写作（主题句+支撑细节）
第一步：审（审题）
审任务：写一篇短文介绍一处工程奇迹（如都江堰、青藏铁路），要包含基本信息、面临的挑战、解决办法、重要意义，并使用提纲结构（主题句+支撑细节），正确运用 although/though 表达转折。
审体裁：说明文，结构清晰：开头（总起介绍）→ 正文（挑战与解决）→ 结尾（意义总结）。
审人称：以**第三人称（it/they/the project）**为主，客观介绍工程。
审时态：
一般现在时：描述工程现在的状态和意义（如：Dujiangyan still works well today.）。
一般过去时：讲述修建历史和解决挑战的过程（如：Li Bing designed it over 2,000 years ago.）。
although/though：用于表达“虽然有挑战，但仍成功解决”的转折关系。
审技能：要学会列提纲写作，用主题句点明段落核心，再用细节支撑；并正确使用 although/though 句型。
第二步：列（列详细提纲）
四段式提纲结构（Intro—Challenge1—Challenge2—Conclusion）
第一段：开头（Introduction）
基本信息：工程名称、位置、历史、设计者（如：Dujiangyan is in Chengdu, China. It has a history of over 2,000 years.）。
总评：用一句话评价它是伟大的工程奇迹（如：It is a great example of epic engineering.）。
第二段：挑战与解决1（Challenge & Solution 1）
主题句：点明第一个挑战（如：One big challenge was the floods in rainy seasons.）。
支撑细节：说明解决办法（如：Engineers used Yuzui and Feishayan to keep water from entering the inner river.）。
第三段：挑战与解决2（Challenge & Solution 2）
主题句：点明第二个挑战（如：Another challenge was the lack of water in dry seasons.）。
支撑细节：说明解决办法（如：They used Baopingkou to guide water into the dry farms.）。
第四段：结尾（Conclusion）
意义：说明工程的价值（如：It improved people's lives and shows the wisdom of the Chinese people.）。
总结：再次强调它是伟大的奇迹（如：It is still in use today, a true wonder.）。
完整提纲示例（以“都江堰”为例）
段落 详细要点 关键词
开头 名称：Dujiangyan 位置：Chengdu, China 3. 历史：over 2,000 years 设计者：Li Bing 4. 总评：great engineering wonder Dujiangyan, Chengdu, 2,000 years, Li Bing, engineering wonder
挑战1 主题句：雨季洪水是一大挑战 2. 细节：用鱼嘴、飞沙堰分流洪水 floods, rainy seasons, Yuzui, Feishayan, keep water out
挑战2 1. 主题句：旱季缺水是另一大挑战 2. 细节：用宝瓶口引水灌溉农田 lack of water, dry seasons, Baopingkou, guide water to farms
结尾 1. 意义：改善民生，体现中国智慧 2. 总结：至今仍在使用，是伟大奇迹 improve lives, wisdom of Chinese people, still in use
第三步：连（连句成篇）
用连接词和 although/though 把提纲要点连成通顺的段落，符合七下水平。
常用连接词（七下重点）
并列：and, also
转折：although/though, but
递进：another, also
连句示范
要点：Dujiangyan is old. It is still useful.
→ 升级：Dujiangyan has a history of over 2,000 years, although it is still in use today.
要点：Floods were a problem. They built Yuzui.
→ 升级：Although floods were a big challenge in rainy seasons, engineers used Yuzui and Feishayan to control the water.
要点：Dry seasons had no water. Baopingkou helped.
→ 升级：Another challenge was the lack of water in dry seasons. They used Baopingkou to guide water to the dry farms.
第四步：美（美化语言）
在保证语法正确的基础上，用提纲结构和although/though句型让文章更专业、更有说服力。
1. 词汇升级
普通词 升级词 例句
old has a history of over... It has a history of over 2,000 years.
big problem big challenge / great difficulty Floods were a big challenge.
use make use of / take advantage of Engineers made use of Yuzui to control floods.
good great / amazing / epic It is a great / epic engineering wonder.
2. 句型升级（although/though + 主题句结构）
基础句：It is old. It works well.
→ 高分句：Although Dujiangyan was built over 2,000 years ago, it still works perfectly today.
基础句：Floods were bad. They fixed it.
→ 高分句：Although there were serious floods in rainy seasons, the engineers found clever ways to solve the problem.
基础句：It helps people. It is important.
→ 高分句：It not only improved the lives of local people, but also shows the great wisdom of ancient Chinese engineers.
主题句+细节：
→ 主题句：One big challenge was the floods in rainy seasons.
→ 支撑细节：Engineers built Yuzui and Feishayan to keep too much water from entering the inner river.
3. 格式美化
段落清晰：开头、两个挑战、结尾各一段，逻辑分明。
主题句明确：每段第一句点明核心，后面用细节支撑。
although/though 正确使用：放在句首或句中，表达“虽然…但是…”，注意不能和 but 连用。
第五步：查（检查纠错）
写完后逐项检查，避免扣分：
格式检查：
确认结构清晰（开头—挑战1—挑战2—结尾）。
确认每段有主题句和支撑细节。
语法检查：
确认人称一致（第三人称为主）。
确认时态正确（过去时讲历史，现在时讲现状）。
确认 although/though 句型正确（没有和 but 连用）。
确认名词单复数正确（如：challenges, solutions, people）。
内容检查：
确认字数在60—100词之间。
确认要点齐全（基本信息+挑战+解决+意义）。
确认使用了 although/though 表达转折。
完整范文
英文范文
Dujiangyan is a great engineering wonder in Chengdu, China. It has a history of over 2,000 years and was designed by Li Bing.
Although there were serious floods in rainy seasons, engineers used Yuzui and Feishayan to keep too much water from entering the inner river. Another big challenge was the lack of water in dry seasons. They built Baopingkou to guide clean water to the dry farmlands.
Today, Dujiangyan still works well. It improved the lives of local people and shows the great wisdom of ancient Chinese engineers. It is truly an epic wonder.
中文对照
都江堰是中国成都的一项伟大工程奇迹。它有2000多年的历史，由李冰设计。
虽然雨季洪水泛滥，但工程师们用鱼嘴和飞沙堰控制了水量，避免过多河水进入内江。另一大挑战是旱季缺水，他们修建了宝瓶口，将清水引入干旱的农田。
如今，都江堰仍在发挥作用。它改善了当地人的生活，展现了中国古代工程师的卓越智慧，是真正的史诗级奇迹。
核心素材
好词
工程类：engineering wonder, challenge, solution, design, build, control, guide
评价类：great, epic, amazing, clever, wise, perfect, still in use
意义类：improve lives, show wisdom, help people, protect the environment
好句
... is a great engineering wonder in ... It has a history of over ... years.
Although ... was a big challenge, engineers found clever ways to solve it.
Another big challenge was ... They used ... to ...
Today, ... still works well. It improved ... and shows the wisdom of ...
It is truly an epic wonder.
although/though 句型示例
Although it was built long ago, it is still very useful today.
Engineers never gave up, though they faced many difficulties.
Even though the weather was bad, they finished the project on time.
学生填空练习版
________ is a great engineering wonder in ________. It has a history of over ________ years and was designed by ________.
Although ________ was a big challenge, engineers used ________ to ________. Another big challenge was ________. They built ________ to ________.
Today, ________ still works well. It improved ________ and shows the wisdom of ________. It is truly an epic wonder.

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