逻辑衔接词的核心作用
雅思写作评分标准中，连贯与衔接占比25%。恰当使用逻辑连接词能使文章结构清晰，论证层次分明。以下分类解析8种高频逻辑关系的专业表达方式。
因果关系表达矩阵
| 表达类型 | 正式程度 | 使用场景 | 例句示范 |
|---|---|---|---|
| 介词短语 | ★★★ | 学术写作 | Owing to the demographic shift, governments should adjust pension policies. |
| 连词 | ★★☆ | 通用场景 | Since renewable energy is cost-effective, its adoption rate keeps increasing. |
※ 注意：Due to引导原因时需接名词短语，不可直接跟句子
对比关系进阶用法
- ▶ Whereas适用于句间对比：Mobile payment dominates in China, whereas cash remains prevalent in Japan.
- ▶ 学术写作优选Conversely替代On the contrary：Some argue technology isolates people. Conversely, it actually facilitates deeper connections.
递进关系黄金组合
▍基础组合 Furthermore + Moreover + What's more 形成论证强度递增
▍学术升级 Additionally, 可与Not only...but also结构配合使用增强表现力
易错点警示专区
⚠️ However后必须接逗号：The data seems promising. However, further verification is required.
⚠️ Therefore在句首时需用逗号分隔：The experiment failed. Therefore, we need to revise the methodology.
实战应用技巧
- 每段使用2-3种不同逻辑连接词
- 避免重复使用同一连接词超过两次
- 复杂句搭配简单连接词，简单句选用高级词汇
