「Never have I seen such a mess.」這種句子在演講、評論和文學裡常常出現：把 never 搬到句首，後面的 have 和 I 就換了位置。這種語序叫倒裝（inversion），作用是把那個副詞抬到聚光燈下，加強語氣。這篇把它整理成三個檢查步驟，寫作時可以逐項核對。
步驟一：句首是不是「否定或限制」的詞？
倒裝的條件，是這類詞被放到句子開頭：
| 開頭詞 | 例 |
|---|---|
| Never | Never have I felt so proud. |
| Rarely | Rarely does she complain. |
| Seldom | Seldom do we see such talent. |
| Hardly | Hardly had we sat down when the lights went out. |
| No sooner | No sooner had she left than it began to rain. |
| Not only | Not only did he forget, but he also lied. |
| Only then | Only then did I understand. |
| Little | Little did they know what was coming. |
| At no time | At no time were the passengers in danger. |
Never have I felt so proud. — 我從來沒有這麼驕傲過。
Rarely does she complain. — 她很少抱怨。
Little did they know what was coming. — 他們完全不知道接下來會發生什麼事。
另外還有 under no circumstances（無論如何都不……）、on no account、in no way 這一類，也是同樣的規則哦～
步驟二：找出助動詞（或 be 動詞），沒有的話就加 do
倒裝要移動的是助動詞，不是動詞本身。
- 句子已經有助動詞（have、will、can、should 等）→ 直接把它移到主詞前面。
- 句子是 be 動詞 → be 動詞移到主詞前面。
- 一般動詞、沒有助動詞 → 要借 do／does／did，動詞回到原形。
Never had I seen anything like it. — 我從來沒看過像它這樣的東西。（had 移前面）
Never was he so happy. — 他從來沒這麼開心過。（was 移前面）
Rarely does she go out on weekdays. — 她很少在平日出門。（借 does，go 回到原形）
不能寫成 Rarely goes she out，這是很常見的錯誤哦。
步驟三：有兩個子句時，看清楚哪一個要倒裝
有幾個開頭詞的句子有兩個子句，要看清楚是哪一個子句要倒裝：
Hardly / No sooner / Scarcely：第一個子句倒裝，後面接 when 或 than：
Hardly had I arrived when the phone rang. — 我才剛到，電話就響了。
No sooner had she left than it began to rain. — 她才剛離開，就下起雨來。
一般的搭配是 hardly／scarcely 配 when，no sooner 配 than。
Not only ... but also：倒裝在第一個子句：
Not only did he forget my birthday, but he also refused to apologize. — 他不僅忘了我的生日，還拒絕道歉。
Only 開頭：倒裝的是主句，不是 only 後面的那一段：
Only when I got home did I notice the missing wallet. — 直到回到家，我才發現錢包不見了。
Only after the meeting did she tell me the news. — 直到會議結束後，她才告訴我那個消息。
也可以用在條件句：省略 if
不需要倒裝的情況
- 否定詞不在句首：I have never seen such a mess. 是普通語序，不倒裝。
- 否定詞本身就是主詞：Nobody knew the answer. 不倒裝，因為 nobody 就是主詞。
- 祈使句：Never give up. 這是命令，不是倒裝。
什麼時候用比較好？
倒裝聽起來偏正式，在演講、書面表達、文學作品，或是想加重語氣時，效果很好；日常對話用太多，會顯得像在演戲。一篇文章裡放一兩個，就足夠讓人留下印象了哦。
檢查清單（寫完再看一次）
- 句首是否為否定或限制性的副詞？
- 有沒有把助動詞（或 be 動詞）移到主詞前？
- 沒有助動詞時，是不是加了 do／does／did，動詞回到原形？
- Hardly／No sooner／Not only 的第二個子句，有沒有搭配對（when、than、but also）？
小測驗
把括號裡的字，改成倒裝的句子，再看答案。
- (Never) I have met such a kind person. → Never have I met such a kind person.
- (Rarely) He goes to the gym. → Rarely does he go to the gym.
- (Not only) She sings well, and she also dances well. → Not only does she sing well, but she also dances well.
- (Only then) I realized my mistake. → Only then did I realize my mistake.
我第一次看到 Little did he know 的時候，還以為 little 是「小小的」，哈哈，後來才明白它在這裡是「幾乎不」的意思，超容易看漏。
最後，下面那顆「我學會了」按一下，讓我知道你學會了吧 (❛◡❛✿)