想強調「不只……還……」，用 and 連接是最基本的，但 not only but also 用法能做到 and 做不到的事——它暗示後面那件事是對方沒預期到的，語氣更有力量，在寫作和正式表達裡特別好用。
Not only but also 中文意思和基本用法
Not only but also 中文是「不只……還……」或「不僅……而且……」。跟 and 的差別不只是說法不同——and 就是把兩件事連在一起，沒什麼特別；not only but also 則是在說「後面這件事你可能沒想到」，有種轉折驚喜的感覺，語氣更有重量。
基本結構：主詞 + not only + A + but also + B
(1)
A: I heard Sarah got promoted.
A: 我聽說 Sarah 升職了。
B: Yeah, and she not only got promoted but also got a significant pay raise.
B: 對，她不只升職了，薪水也大幅調漲。
(2)
A: How was the new restaurant?
A: 那家新餐廳怎麼樣？
B: Amazing. The food was not only delicious but also incredibly affordable.
B: 超棒的。食物不只好吃，價格還很實惠。
(3)
A: Did the project go well?
A: 專案進行順利嗎？
B: Better than expected. We not only finished on time but also came in under budget.
B: 比預期更好。我們不只準時完成，費用還低於預算。
(4)
A: What do you think of the new team member?
A: 你覺得新的團隊成員怎麼樣？
B: She’s great. She not only picks things up fast but also brings a lot of fresh ideas.
B: 她很厲害，不只學東西很快，還帶來了很多新想法。
(5)
A: Why do you recommend learning a second language?
A: 你為什麼推薦學第二語言？
B: Learning a new language not only opens up career opportunities but also changes the way you think.
B: 學新語言不只打開了職涯機會，也改變了你思考的方式。
(6)
A: The typhoon was really bad this year.
A: 今年颱風真的很嚴重。
B: It not only damaged buildings but also caused widespread flooding across the entire region.
B: 它不只破壞了建築物，還在整個地區造成了大規模洪水。
A 和 B 一定要平行 – 這是最容易寫錯的地方
Not only but also 用法裡最容易出錯的就是這個：A 和 B 的詞性要一樣——名詞對名詞、動詞對動詞、形容詞對形容詞。聽起來有點複雜，但其實看一眼就能感覺出來哪裡不對勁。
(7)
✘ She is not only a good teacher but also teaches with passion.
（a good teacher 是名詞，teaches with passion 是動詞片語，不平行）
✔ She is not only a good teacher but also a passionate one.
她不只是一位好老師，也是一位充滿熱情的老師。
(8)
✘ He not only works hard but also is very talented.
（works hard 是動詞片語，is very talented 是 be 動詞結構，不平行）
✔ He is not only hardworking but also very talented.
他不只勤奮，也非常有天分。
(9)
✘ The app is not only free but also you can use it offline.
（free 是形容詞，you can use it offline 是子句，不平行）
✔ The app is not only free but also available offline.
這個 app 不只免費，還可以離線使用。
(10)
✔ 正確的各種平行組合：
名詞對名詞：She is not only a writer but also an illustrator.
她不只是作家，也是插畫家。
動詞對動詞：He not only cooks well but also bakes.
他不只擅長煮菜，烘焙也很在行。
形容詞對形容詞：The trip was not only exhausting but also unforgettable.
那趟旅程不只很累，也令人難忘。
Not only 放句首——倒裝句怎麼用
Not only 放句首的時候，後面語序要變 — 主詞和助動詞要對調，變成問句的排列。這個規則有點像中文倒裝句的感覺，把重點提到前面，語氣更強。
結構：Not only + 助動詞 + 主詞 + 動詞, but + 主詞 + also + 動詞
倒裝版比一般語序更正式，在報告或書面寫作裡讀起來更有節奏感。這跟強調語氣的英文句型裡的 do + 原形動詞有類似的效果。
(11)
一般語序：She not only speaks French but also writes it fluently.
倒裝句首：Not only does she speak French, but she also writes it fluently.
她不只會說法文，還能流暢地寫法文。
(12)
一般語序：The team not only met the deadline but also exceeded expectations.
倒裝句首：Not only did the team meet the deadline, but they also exceeded expectations.
團隊不只趕上了截止日期，還超出了預期。
(13)
一般語序：The storm has damaged the roof but also flooded the basement.
倒裝句首：Not only has the storm damaged the roof, but it has also flooded the basement.
暴風雨不只損壞了屋頂，還淹了地下室。
(14)
A: Why did the event get so much attention?
A: 為什麼那個活動得到這麼多關注？
B: Not only was it the first of its kind in Asia, but it also drew speakers from over 30 countries.
B: 它不只是亞洲同類活動的首創，還吸引了來自 30 多個國家的講者。
But also 可以省略嗎？
口語裡 also 常常省略，直接說 not only…but…，意思一樣，說起來更順。或者整個換成 as well 放句尾，聽起來更輕鬆隨意。
(15)
完整版：She not only speaks Spanish but also understands Portuguese.
省略版：She not only speaks Spanish but understands Portuguese.
as well 版：She speaks Spanish, and she understands Portuguese as well.
她不只說西班牙文，還懂葡萄牙文。
(16)
完整版：He not only apologized but also sent flowers.
省略版：He not only apologized but sent flowers.
as well 版：He apologized and sent flowers as well.
他不只道歉，還送了花。
常見錯誤整理
把三個最常踩到的錯誤列出來，每個都附上怎麼改。
(17)
✘ Not only she passed the exam, but she also got the highest score.（not only 放句首沒倒裝）
✔ Not only did she pass the exam, but she also got the highest score.
她不只通過了考試，還拿了最高分。
(18)
✘ He not only is smart but also works hard.（is smart 和 works hard 不平行，一個是形容詞一個是動詞）
✔ He is not only smart but also hardworking.
他不只聰明，也很勤奮。
(19)
✘ The course is not only useful but also it’s affordable.（useful 是形容詞，it’s affordable 是子句，不平行）
✔ The course is not only useful but also affordable.
這個課程不只實用，價格也很實惠。
A 和 B 要平行、not only 放句首要倒裝——記住這兩件事，用起來就不會出錯。下次想說「不只……還……」，試試 not only but also，比 and 更有說服力。
延伸閱讀：【Cohesive devices 銜接詞：讓英文段落更有邏輯和層次】
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