【Notonly的倒装用法】在英语中，"not only... but also..." 是一个常见的结构，用于强调两个并列的内容。然而，当这个结构出现在句首时，句子需要使用倒装语序。这种倒装结构不仅增强了语言的表现力，还让句子更符合正式或书面语的表达习惯。
一、Not only 的倒装用法总结
| 结构 | 说明 | 示例 |
| Not only + 倒装主语 + 助动词/情态动词 + 动词原形 | 当 "not only" 放在句首时，后面的句子要进行倒装 | Not only did he finish the work, but he also did it perfectly. |
| Not only + 倒装主语 + be 动词 + 表语 | 在 "be" 动词结构中，同样需要倒装 | Not only is she talented, but she is also hardworking. |
| Not only + 倒装主语 + 情态动词 + 动词原形 | 在情态动词后也需倒装 | Not only can she speak three languages, but she can also write in them. |
二、使用规则与注意事项
1. 倒装前提：只有当 "not only" 放在句首时，才需要倒装；如果放在句中，则不需要。
- 正确：Not only does he like music, but he plays the piano.
- 错误：He not only likes music, but he plays the piano.
2. 助动词的选择：根据句子的时态和结构选择适当的助动词（如 do, does, did, can, will 等）。
3. 避免重复：在倒装结构中，通常省略 "but also" 后面的主语，以保持句子简洁。
- 正确：Not only did she pass the exam, but she got the highest score.
- 错误：Not only did she pass the exam, but she also passed the exam.
4. 口语与书面语的区别：虽然倒装结构常用于书面语，但在某些口语场合中也可以使用，但不如书面语常见。
三、常见错误与辨析
| 错误句子 | 正确句子 | 说明 |
| Not only he finished the task, but he also helped others. | Not only did he finish the task, but he also helped others. | "Not only" 在句首，需倒装 |
| Not only is she beautiful, and she is kind. | Not only is she beautiful, but she is kind. | "and" 应改为 "but"，并注意倒装 |
| Not only can he swim, and he can run fast. | Not only can he swim, but he can run fast. | 同样应使用 "but" 连接两部分 |
四、小结
"not only... but also..." 的倒装用法是英语中一种重要的语法现象，尤其在正式写作中频繁出现。掌握其倒装规则不仅能提升语言准确性，还能增强表达的逻辑性和层次感。通过不断练习和积累，可以更加自然地运用这一结构，使语言表达更加地道和专业。
