2.Neither / Nor + 助动词 + 主语：……也不。I can't swim. Neither can she.
3.Only + 状语 + 助动词 + 主语 + 动词：Only then did I realize it.
4. 否定词前置：never / seldom / hardly / rarely / little / not only。
5.Never have I seen such a thing.（我从未见过）
6. 规则动词要补助动词 do/does/did：Never did I see…（不是 Never I saw）。
7. only 修饰主语时不倒装：Only Tom knew the answer.
8. 否定词在宾语位置前置才倒装：Not a word did he say.
9. 频度副词 never/seldom 放句首才倒装，句中不倒装。
用法速查：规则与例句对照
触发词
正常语序
倒装语序（句首强调）
neither / nor（也不）
She can't swim. I can't either.
She can't swim. Neither can I.
so（也是，肯定）
I like music. My brother likes it too.
I like music. So does my brother.
only then / only later
I realized it then.
Only then did I realize it.
never（从不）
I have never seen such a mess.
Never have I seen such a mess.
seldom / rarely（很少）
He seldom goes out.
Seldom does he go out.
not only…but also
She not only sings but also dances.
Not only does she sing, but she also dances.
倒装怎么构成（三步走）
步骤
说明
例子
① 找助动词
完成时 have/has、进行时 be、情态动词等
I have never seen… → have
② 提前到主语前
否定词放句首，助动词跟在其后
Never have I seen…
③ 无助动词补 do
一般现在/过去时实义动词，补 do/does/did
Never did I see… / Only then did I know…
高频倒装句速记
英文例句
中文
Neither do I.
我也不。
So do I.
我也是。
Never have I seen such a thing.
我从没见过这等事。
Only then did I understand.
那时我才明白。
Seldom does he go out.
他很少出门。
Not only is she smart, but she is kind.
她不仅聪明还善良。
Hardly had I arrived when it rained.
我刚到就下雨了。
Little did he know the truth.
他当时一点不知道真相。
考点清单（CAE）
考点
常见考法
Neither/So do I
简短回应倒装
Never/Seldom 前置
否定词提前助动词前移
Only + 状语
Only then did I…
Not only…but also
前半句倒装
Hardly…when
Hardly had I…
补 do/does/did
实义动词倒装
不倒装判断
否定词在句中不倒装
虚拟条件省略 if
Were I you…（拔高）
易混点辨析
表达
区别
So do I / Neither do I
肯定附和 vs 否定附和
Never 句首 / 句中
句首倒装，句中不倒装
Only 主语 / Only 状语
修饰主语不倒装
do/does/did 补出
实义动词倒装必须补助动词
not only 倒 / but also 不倒
只倒前半句
完全倒装 / 部分倒装
本页是部分倒装（助动词提前）
Seldom do I…
= I seldom…
Rarely have we…
= We rarely…
Hardly…when
Hardly had I arrived when it rained.
No sooner…than
No sooner had I left than he called.
Not until…
Not until then did I know.
Only in this way…
Only in this way can we win.
例句精讲
I don't like horror films. — Neither do I.
我不喜欢恐怖片。——我也是。（Neither + 助动词 + 主语）
Only after he left did I notice his gift.
直到他走后，我才注意到他的礼物。（Only + 状语前置，补 did）
Not only is she smart, but she is also hard-working.
她不仅聪明，而且勤奋。（Not only 前置，be 动词提前）
防坑三则① 只有否定 / 限定性状语放句首才倒装；否定词在句中不倒装：I have never seen it（正常）。 ② 实义动词要补 do/does/did：Only then did I know，不是 Only then I knew。 ③ not only…but also 只在 not only 所在分句倒装，but also 后用正常语序。
补充对照
正常语序 ⇄ 倒装对照
正常语序
倒装语序（句首强调）
I have never seen it.
Never have I seen it.
I realized it only then.
Only then did I realize it.
I can't swim, and he can't either.
…Neither can he.
He not only sings but dances.
Not only does he sing, but he also dances.
I seldom go out at night.
Seldom do I go out at night.
中国学生高频错误诊断
错误 1：不倒装 ✗ Never I have seen it. → ✓ Never have I seen it. 否定词前置助动词提前。
错误 2：实义动词没补 do ✗ Only then I knew. → ✓ Only then did I know. 一般过去时实义动词补 did。
错误 3：not only 两句都倒 ✗ Not only does she sing, but also does she dance. → ✓ …but she also dances. 只倒前一分句。
记忆口诀
三句口诀① 否定限定词放句首，助动词立刻提前。② 实义动词别裸奔，补上 do/does/did。③ not only 倒装前半句，but also 后面照常走。
口语跟读：说出来才算会
跟读 · 互译练习
我也不会：I can't swim. — Neither can I.
我从未见过：Never have I seen such a mess.
直到那时我才明白：Only then did I realize it.
挑战：把 I have never eaten snakes 改成 Never 开头的倒装句。
自测三题（点击按钮对答案）
basic倒装改写：I have never heard such a story. → Never ___ ___ ___ such a story.