【Notonly的倒装用法】在英语学习中，“not only... but also...”是一个常见的结构，用于强调两个并列成分。然而，当“not only”位于句首时，句子需要使用倒装结构，以符合语法规则。这种倒装用法不仅体现了英语语法的灵活性，也增强了语言的表现力。
一、
“Not only”的倒装用法是指当“not only”置于句首时，主句中的谓语动词需要进行倒装，即把助动词或情态动词提前到主语之前。这种结构常用于强调前半部分的内容，使句子更具逻辑性和语气上的重点。
例如：
- Not only did he arrive late, but he also forgot his homework.
（他不仅迟到了，还忘带作业了。）
这种结构在正式写作和口语表达中都较为常见，尤其是在描述对比或递进关系时。
二、Not only 倒装用法表格总结
| 用法类型 | 结构示例 | 说明 |
| 一般现在时 | Not only does she sing, but she also dances. | “does” 提前于主语“she”，构成倒装。 |
| 一般过去时 | Not only did they leave early, but they also missed the bus. | “did” 提前于主语“they”，构成倒装。 |
| 现在完成时 | Not only has he finished his work, but he also helped others. | “has” 提前于主语“he”，构成倒装。 |
| 情态动词 | Not only can he speak three languages, but he also writes poems. | “can” 提前于主语“he”，构成倒装。 |
| 动词原形 | Not only goes he to school every day, but he also studies hard. | “goes” 改为“go”（原形），但通常不建议这样使用，更常见的是用助动词。 |
三、注意事项
1. 倒装必须与“but also”搭配使用，否则结构不完整。
2. “not only”不能单独使用，必须与“but also”一起出现。
3. “not only”位于句首时，后接的句子必须倒装，而“but also”后面的句子保持正常语序。
4. 避免在非正式场合过度使用倒装结构，以免显得生硬或不自然。
四、常见错误
| 错误用法 | 正确用法 | 说明 |
| Not only he arrived late. | Not only did he arrive late, but he also forgot his homework. | 缺少“but also”和倒装结构，不符合语法规则。 |
| Not only she sings, but also dances. | Not only does she sing, but she also dances. | “does” 应提前至主语“she”之前。 |
| Not only went he to the party, but also stayed late. | Not only did he go to the party, but he also stayed late. | “went” 应改为“go”并配合助动词“did”形成倒装。 |
五、小结
“Not only”的倒装用法是英语中一种重要的语法现象，尤其在强调和修辞方面具有独特作用。掌握其结构和用法，有助于提升语言表达的准确性和地道性。通过合理运用这一结构，可以使句子更加流畅、自然，并增强表达的层次感。
