Cause–Effect 结构让说明更顺畅、更专业
🔍 一、什么是 Cause–Effect（原因—影响）句型？
Cause–Effect 是在写作中用于解释“为什么会发生某一现象（原因）”及“这一现象带来了什么结果（影响）”的结构。
适用范围非常广：
- 📝 说明文
- 📚 学术写作
- 🗣️ 观点论证
- 📊 趋势说明
- 💡 机制解释
相比普通句子，因果句型更能体现作者的逻辑思考能力。
🔍 二、最常用的 Cause–Effect 句型公式
1️⃣ because / because of 结构（基础版）
- A happens because B.
- Because of B, A happens.
例句：
- Students improve faster because they receive consistent feedback.
2️⃣ due to / owing to 结构（正式版）
适用于正式写作，语气更严谨。
例句：
- Due to limited exposure, many learners struggle to acquire natural expressions.
3️⃣ lead to / result in（强调“结果”）
适合描述机制或影响链条。
例句：
- Irregular practice often leads to stagnation in language development.
4️⃣ therefore / consequently（结果前置型）
用于强调“结果的重要性”。
例句：
- The tasks were too complex; therefore, students experienced cognitive overload.
🔍 三、Cause–Effect 写作的三大核心原则
✔ 原则1：确保因果链条清晰
因果必须“能够解释”，而不是强行成立。
❌ 错误：
- The class was noisy, so students learned grammar.（不具因果关系）
✔ 修正：
- The class was noisy, so students could hardly focus on grammar explanations.
✔ 原则2：不要在一个句子堆叠多个原因
会造成逻辑混乱。
❌ 错误：
- Because students were tired and the room was hot and the task was long, they gave up.
✔ 逻辑拆分：
- Students gave up mainly because they were tired. The long task and hot environment further reduced their motivation.
✔ 原则3：原因要“可解释”，结果要“可观察”
原因 = 内部机制、背景、影响因素
结果 = 变化、数据、行为、趋势
示例：
- Lack of review leads to rapid forgetting.（原因=缺复习；结果=遗忘）
🔍 四、进阶写作：如何让解释型段落更有深度？
⭐ 技巧1：使用“中间机制”增强说服力
不仅写“原因→结果”，而是写：
原因 → 机制 → 结果
示例：
- Limited input reduces language sensitivity, which in turn slows down vocabulary expansion.
⭐ 技巧2：让结果更具体（能衡量、能观察）
将抽象结果变成可观察的变化。
❌ 抽象：
- This leads to problems.
✔ 具体：
- This leads to lower accuracy and slower task completion.
⭐ 技巧3：避免“顺序错位”
解释一定要“先因→后果”。
❌ 错误：
- Students became anxious; because the exam was difficult.（顺序颠倒）
✔ 修正：
- Because the exam was difficult, students became anxious.
🔍 五、示范段落（可用于写作）
Because digital materials are updated frequently, learners gain access to more relevant examples and contextual explanations. This increased exposure leads to faster recognition of common patterns, consequently improving reading efficiency and comprehension accuracy.
🔍 六、课堂练习（3题）
- 用 result in 写一句说明“学习方法差异 → 结果不同”。
- 将以下句子改为正式因果句型：
“Students don’t review, so they forget quickly.” - 写一句“原因→机制→结果”的进阶因果句。
如果你想真正把“原因—影响结构”用得熟练，李校来啦智能英语”的写作分析功能，它会实时标注你的因果链条并给出结构优化，效果特别明显。
