为什么对比论证是高分作文的核心？
雅思写作Task 2、高考读后续写、中考英语作文——几乎每一种议论文题目，都要求你做对比：
- 在家学习 vs. 在校学习
- 大城市发展 vs. 小城市生活
- 传统媒体 vs. 新兴媒体
大部分中国学生写对比只有三板斧：
But... / However... / On the other hand...这些用多了，文章结构扁平，读起来像套模板。
今天我们看《金融时报》一篇Robinhood IPO的报道——一个被誉为”Lex专栏”的商业评论——从中提取3种专业记者写对比的结构，让你的议论文瞬间提升一个档次。
📖 素材来源： FT №179 — Robinhood IPO: model is a tempting target for regulators
技巧一：用鲜明的数字对比建立论点
很多同学写对比时只说”不同”，但没说”差多少”。FT的做法是：用具体数字把差距钉在读者眼前。
看原文：
Revenue more than tripled to 958m last year… That explosive growth has continued in 2021. Revenue already topped 522m in the first quarter. A viral meme-stock and cryptocurrency trading boom helped the platform to more than double the number of funded accounts over the past 12 months to 18m.
这里用了三个层层递进的数据：
- 营收增长 3倍多 → 去年958m
- 今年Q1已超 522m → 增长在延续
- 付费账户数 翻倍 → 1800万
写作应用：
写对比时，不要只写”A比B大”，要写出具体的差距：
| ❌ 模糊对比 | ✅ 数据对比 |
|---|---|
| Robinhood grew very fast in 2020. | Revenue more than tripled to 958m in 2020. |
| More people use the app now. | The number of funded accounts more than doubled to 18m. |
| The company is profitable but not very. | Charles Schwab made 3.3bn in profit last year, against Robinhood’s 7m. |
公式： 倍数词(more than doubled / tripled / quadrupled) + 具体数字(to Xm / to Y million)
这个公式学生可以直接背进作文。写”科技对生活的影响”时，别写”Technology changed our lives a lot”，写”Smartphone usage more than tripled to 3.8 billion users over the past decade.”
技巧二：用”反之亦然”句式做反向对比
FT在描述完Robinhood的增长后，笔锋一转，写风险。这个转折不是简单用”however”，而是用了一个非常高级的结构：
But the filing also highlights just how vulnerable Robinhood’s business model is to regulatory scrutiny.
然后紧接着用数据做反向对比：
Revenue more than tripled last year → But the model is vulnerable
40bn valuation → vs. Charles Schwab trades on just 12 times earnings
这才是高级论证：先说正面，然后指出反面，两边都有数据支撑。
FT甚至在第8段写了一个教科书级的对比段落：
Add to this Robinhood’s meagre profitability and the 40bn valuation the company is seeking looks steep.
Assuming the app can double its revenue this year, that still implies a valuation of 20 times that.
Charles Schwab, which made 3.3bn in profit last year against Robinhood’s 7m, trades on a ratio of just 12 times.
看这个结构：
- Add to this [A] and [B] looks steep → 点出问题
- Assuming…that still implies… → 退一步论证（即使好的假设，结论也不乐观）
- [Company X], which…against [Company Y] → 用对手做对比参照
写作应用：
写”线上学习的利弊”时：
Add to this the lack of face-to-face interaction and the efficiency of online learning looks questionable.
Assuming students can stay focused throughout a 40-minute online class, that still implies a significant gap compared to in-person discussion.
Traditional classrooms, where teachers can instantly read students’ facial expressions against a computer screen, create a feedback loop that online platforms struggle to match.
技巧三：用”if…then…”的假设对比制造张力
FT Lex专栏的结尾太漂亮了，我直接放上来：
If the stock tanks on opening day…it also risks further public outcry from an army of unhappy buyers.
注意这个结构：
- If + 假设条件 → 提出一个不利场景
- If的反面(implied) → 如果IPO成功会怎样？
- then + 风险 → 无论成败，都可能有问题
不写”如果这样就这样”，而是写**“即使在最乐观的假设下，也…”**——这种反转式的假设论证，就是Lex专栏出彩的地方。
再看第5段更经典的：
Any changes could deal a big blow to Robinhood’s business model.
As it does not charge clients a fee on making stock trades, the company makes the bulk of its revenue from payment-for-order flows.
These accounted for about 63 per cent of Robinhood’s first quarter revenue.
结构清晰：
- Claim (Any changes could deal a big blow)
- Reason (because the company…)
- Evidence (63 per cent of revenue)
写作应用：
Any changes to the current exam system could deal a big blow to students’ learning habits.
As many students rely on standardised tests as their only motivation, a sudden shift might leave them without a clear direction.
Exams account for over 80 per cent of high school students’ primary study goals, according to a recent survey.
本课总结
| 技巧 | 核心句式 | 适用场景 |
|---|---|---|
| 数据对比 | more than doubled/tripled to [number] | 描述变化、增长、差距 |
| 反向对比 | Add to this [A] and [B] looks [adj] / ...against... | 先扬后抑、全面论证 |
| 假设对比 | If...then... / Any [change] could [effect] | 分析利弊、预测后果 |
这三个结构，不是背模板，而是思维框架——对比不是”A和B不一样”，而是”A在这样的条件下，比B好/差这么多”。
互动： 试着用这个公式写一个对比句，评论告诉我。
本文例句选自 Financial Times Lex专栏 “Robinhood IPO: model is a tempting target for regulators” (2021年7月)