知识点深化 · 写作 Task2 · 结构与论证

Task2 议论文：四段结构与论证方法库

这一页是写作 Unit 3 的配套深化库：把 Task2 的四段结构和"论点—解释—例子"展开法做成可直接套用的模板，再配上四大论证方法，让你的大作文论证充实、不空洞。

① 这一课怎么学

1读（15 分钟）
看②结构和③论证方法。

2套（20 分钟）
用⑤范文结构拆一篇。

3背（10 分钟）
背⑧开头结尾模板。

4写（15 分钟）
按结构写一个主体段。

本课小目标学完你能独立写出"开头—主体1—主体2—结尾"四段，且每个主体段都有论点+解释+例子。

② 一图看懂四段结构

Task2
四段结构

→

开头段

改写题目

亮立场

→

主体段1

论点

解释+例子

→

主体段2

论点

解释+例子

→

结尾段

重申立场

收束

③ 主体段的"汉堡"结构

每个主体段就是一个汉堡：主题句（面包顶）→ 解释（肉）→ 例子（菜）。

主题句一句话点明这段要说什么。解释为什么这样。例子一个具体的例子。三者齐全，段落才不空洞。

④ 四大论证方法

方法	作用	信号词
因果	讲后果	This leads to / As a result / because
举例	具体化	For example / For instance
对比	反衬	In contrast / On the other hand
让步	显辩证	Although / Admittedly / Despite

⑤ 范文结构拆解

开头：It is sometimes argued that school children should wear uniforms. While uniforms have benefits, I believe they can also limit individuality.
主体1：On the one hand, uniforms promote equality. This is because students are judged less by their clothes. For example, no one feels embarrassed about wearing cheap brands.
主体2：On the other hand, uniforms may stifle self-expression. Teenagers express identity through clothing, and banning it can reduce their confidence.
结尾：In conclusion, although uniforms reduce inequality, I feel schools should allow some freedom in dress.

四段对应：开头改写+立场；主体1平等（论点+解释+例子）；主体2个性（论点+解释）；结尾重申立场。

⑥ 易错诊断

错误 1：开头不写立场考官要在前两段就看出你的态度，别把立场藏到结尾。

错误 2：主体段只有论点光说"uniforms are good"不解释不举例 = TR 低分。

错误 3：超字数或不够少于 250 词扣分；写到 350+ 也没必要，40 分钟写不完检查。

⑦ 真题风格演练

真题风格"Some think university students should focus on one subject, others think they should study many. Discuss both views." 请写出开头段（改写+立场）。

参考：People have different views on whether university education should be specialised or broad. While studying many subjects develops well-rounded skills, I believe focusing on one leads to deeper expertise.

真题风格给主体段论点 "Learning a foreign language is essential." 补一句解释+一句例子。

解释：It improves employment prospects in a globalised economy. 例子：For example, graduates who speak two languages often have more job opportunities in international companies.

⑧ 背诵卡：开头结尾模板

开头改写：It is often argued that... 人们常说……
开头立场：While ... has benefits, I believe ... 尽管……有益，我认为……
主体1开头：On the one hand, ... 一方面……
主体2开头：On the other hand, ... 另一方面……
结尾：In conclusion, although ... , I feel ... 总之，尽管……，我认为……

⑨ 口语演练（口头搭框架）

练习 A：口头说出一篇 "Should animals be kept in zoos?" 的四段提纲（每段一句）。

练习 B：选主体段其一，口头展开成 3 句（论点+解释+例子）。

⑩ 分层练习

基础 1把下面补成汉堡段：Driving cars in city centres should be restricted. (解释) Because... (例子) For instance...

参考：Because it reduces pollution and congestion. For instance, central London's congestion charge cut traffic significantly.

进阶 2写结尾段：题目 "Is reading better than watching TV?"

参考：In conclusion, although TV is more entertaining, I believe reading is more beneficial for the mind because it requires active imagination.

挑战 3限时 10 分钟，写一个完整主体段（约 80 词）：论点 "Working from home has drawbacks."

参考：On the other hand, remote work can be isolating. Without face-to-face contact, employees may feel lonely and miss team support. For example, many home workers report a weaker sense of belonging to their company.

⑪ 小结

口诀四段结构固定走，开头立场要先有；主体汉堡顶肉菜，论点解释加例子。

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