🎯 如何找主干

去掉所有修饰成分，找到句子的主语、谓语和宾语（或表语）。

步骤：

1. 先找谓语动词（注意区分主句谓语和从句谓语）

2. 向前找主语（通常在句首或介词短语之后）

3. 向后找宾语/表语/补语

4. 跳过：介词短语、从句、非谓语结构、插入语

示例：
In spite of the enormous growth of e-commerce, the majority of consumers who shop online still prefer to make their final purchases in physical stores.
主干：The majority of consumers still prefer to make their final purchases.

🔍 如何识别修饰成分

识别定语、状语、同位语、插入语等非核心成分。

常见修饰成分标志：

1. which/who/that/where/when — 引导定语从句

2. -ing/-ed 短语 — 非谓语作定语/状语

3. 介词短语（in, of, with, by...） — 定语或状语

4. 两个逗号之间 — 插入语或非限定性定语从句

5. 破折号之间 — 解释说明/插入成分

标记法：将修饰成分用圆括号或斜线标出，剩下的就是主干。
(Having been informed of the test results), the doctor (immediately) decided to change the treatment plan (for the patient).

🛠 如何处理嵌套从句

由外向内逐层剥离，先理解最外层结构。

剥洋葱法：

1. 找到主句（第一层）

2. 找到主句中包含的从句（第二层）

3. 找到从句中嵌套的从句（第三层）

4. 从最内层开始翻译，逐层往外

The report revealed that the officials [who had been responsible for the project [which was initially designed to improve public transportation]] had failed to consider the long-term consequences.
第一层（主句）：The report revealed...
第二层（宾语从句）：that the officials had failed...
第三层（定语从句）：who had been responsible for the project...
第四层（定语从句）：which was initially designed to...

🔗 如何理解复杂并列结构

找准并列连词，判断并列的是什么成分。

关键点：

1. 找到 and, but, or, nor, not only...but also, either...or

2. 判断并列的层级：并列的是句子？从句？短语？单词？

3. 原则：并列成分在语法功能上必须对等

The study found that economic growth can reduce poverty and that it can create new employment opportunities, but that the benefits are not always evenly distributed.
分析：三个 that 从句并列作 found 的宾语，由 and 和 but 连接。

✂ 断句标记法

用 / // /// 将句子按层级断开，化繁为简。

标记规则：

/ — 分隔短语或小成分

// — 分隔从句

/// — 分隔主要并列分句

示例：
The researchers, /// / who had spent years / studying the effects / of climate change / on coastal regions /, /// concluded // that the current policies // / designed to mitigate environmental damage / // were insufficient // and that immediate action was necessary.

读法：先读 /// 级别获得主干，再读 // 级别理解从句，最后补充 / 级别的修饰。