倒装句：Not only 放句首，后面怎么接？
倒装句是让你的英语从"能懂"升级到"地道"的关键工具。它不是装高级的语法花招——在日常口语、商务邮件、学术写作中都非常常见。掌握四种核心倒装模式，你的表达力直接上一个台阶。
什么是倒装？一句话说清楚
正常语序是"主语 + 动词"。倒装是把助动词或 be 动词提到主语前面，和疑问句的语序一样。但注意：倒装句不是问句，它是陈述句。
Never have I seen such a beautiful sunset.
我从未见过如此美丽的日落。（正常语序：I have never seen...）
模式一：否定词句首倒装
当否定副词或短语放在句首时，主语和助动词倒装。这是最常用的倒装模式。
| 否定词 | 倒装例句 | 正常语序 |
|---|---|---|
| Never | Never have I felt so alive. | I have never felt so alive. |
| Seldom / Rarely | Rarely does he complain. | He rarely complains. |
| Hardly...when | Hardly had I arrived when it started raining. | I had hardly arrived when it started raining. |
| No sooner...than | No sooner had we sat down than the show began. | We had no sooner sat down than the show began. |
| Not until | Not until midnight did he come home. | He did not come home until midnight. |
| Under no circumstances | Under no circumstances should you open this door. | You should not open this door under any circumstances. |
Not until 倒装注意：not until 后面的从句不倒装，主句才倒装。例如：Not until she arrived（从句，不倒装）did the meeting start（主句，倒装）。
模式二：Only 状语倒装
only 加状语（副词、介词短语或状语从句）放在句首时，主句倒装。
Only then did I realize my mistake.
只有那时我才意识到自己的错误。
Only by practicing every day can you improve.
只有每天练习，你才能进步。
Only when I saw her in person did I understand.
只有当我亲眼见到她时，我才理解。
模式三：Not only...but also 倒装
not only 在句首时，它所在的半句要倒装（助动词提前），but also 后面的半句正常语序。
Not only does she speak French, but she also speaks Japanese.
她不仅会说法语，还会说日语。
Not only is he a great musician, but he is also a talented writer.
他不仅是个出色的音乐家，还是个有才华的作家。
Not only did they finish early, but they also came in under budget.
他们不仅提前完成了，还省了预算。
模式四：So / Neither / Nor 倒装
表示"也是"或"也不是"的时候，用 so（肯定）或 neither/nor（否定）开头，然后倒装。
I love jazz. — So do I.
我喜欢爵士。——我也是。
She has been to Paris. — So has her sister.
她去过巴黎。——她姐姐也去过。
I can't swim. — Neither can I.
我不会游泳。——我也不会。
He didn't finish the report. — Nor did his colleague.
他没完成报告。——他同事也没完成。
写作中倒装句的节奏感
在四六级作文和雅思写作中，适当使用倒装句式可以显著提升文章的语法丰富度评分。但不要滥用——一篇文章用 1-2 个倒装句就足够出彩了。
倒装句核心公式：把助动词（do/does/did/have/has/had/can/will/would 等）或 be 动词提到主语前。如果原句没有助动词，就需要"借"一个 do/does/did 来帮助倒装。例如：He rarely smiles. → Rarely does he smile.（借了 does，smiles 变回原形 smile）
总结
- 否定词句首 → 倒装：Never / Seldom / Hardly / Not until + 倒装
- Only 状语句首 → 倒装：Only then / Only when / Only by + 倒装
- Not only 句首 → 前半倒装：Not only does he... but he also...
- So / Neither 句首 → 倒装：So do I. / Neither can I.