【not only hellip but also倒装】在英语语法中，“not only...but also”是一个常见的连接结构，用于强调两个并列成分。当“not only”位于句首时，句子通常需要使用倒装结构，以符合英语语法规则。这种倒装形式不仅增强了句子的语气，也使语言表达更加正式和书面化。
“not only...but also”的基本结构是：“Not only + 主语 + 动词 + ... but also + 主语 + 动词”。需要注意的是，倒装只发生在“not only”引导的分句中，而“but also”后面的分句保持正常语序。
以下是“not only...but also”倒装结构的常见用法及例句，帮助读者更好地理解和掌握这一语法点。
表格展示：
| 结构类型 | 正常语序 | 倒装语序 | 说明 |
| 主语 + 谓语 | He not only studies English, but also plays the piano. | Not only does he study English, but also he plays the piano. | “not only”置于句首，需倒装 |
| 名词短语 | Not only the teacher, but also the students were surprised. | Not only the teacher, but also the students were surprised. | 当“not only”后接名词时，不需倒装 |
| 动词原形 | Not only can she speak French, but also she writes in it. | Not only can she speak French, but also she writes in it. | “can”为情态动词，倒装时保留原位 |
| 过去分词 | Not only was the movie interesting, but also it was funny. | Not only was the movie interesting, but also it was funny. | 系动词+形容词时，倒装结构不变 |
注意事项：
- “not only...but also”连接两个并列成分时，应确保两者在语法上一致。
- 倒装仅适用于“not only”后的分句，而“but also”后的部分保持正常语序。
- 在口语中，有时可以省略倒装，但在正式写作或考试中建议使用倒装结构。
通过掌握“not only...but also”的倒装用法，可以提升英语表达的准确性和地道性。
