不是A，而是B (bú shì A, ér shì B) — not A, but rather B
Reach for this when you need to shoot down one interpretation and replace it with the correct one — 'it's not A, it's actually B.' It's the precision-correction structure in Chinese: A is what people might assume or what's been suggested; B is the real story. Common in arguments, essays, news commentary, and any time you're redirecting emphasis.
Structure
不是 [A]，而是 [B]
bú shì... ér shì...
How to Think About It
而是 is doing heavy lifting that 'but' alone doesn't capture in English. The 而 signals a pivot — same speaker, same topic, but a sharper turn than 但是 would give. 不是A，是B works in casual speech, but 而是 is what you reach for when the contrast is the whole point of the sentence: the structure forces the listener to throw out A entirely and accept B as the only valid reading.
Examples
这不是问题，而是机会。
Zhè bú shì wèntí, ér shì jīhuì.
This isn't a problem; it's an opportunity.
他不是不想来，而是没有时间。
Tā bú shì bù xiǎng lái, ér shì méiyǒu shíjiān.
It's not that he doesn't want to come — he just doesn't have time.
真正的智能不是计算，而是理解。
Zhēnzhèng de zhìnéng bú shì jìsuàn, ér shì lǐjiě.
True intelligence isn't calculation; it's understanding.
Common Mistake
Learners often drop the 而 and write '不是A，是B' in formal writing, where the bald 是 sounds choppy and weak. Conversely, they sometimes use 但是 instead of 而是, which is wrong here — 但是 introduces a contrast, not a correction. If you're replacing A with B (not adding new info), it has to be 而是.
他不是老师，但是医生。
他不是老师，而是医生。
Don't Confuse With
A 不是 B，是 C
Casual spoken version with the bare 是. Same meaning, but drops the formal 而. Use 而是 in essays and news; the bare version in everyday speech.
不但...而且...
Adds B on top of A ('not only A but also B'), keeping both. 不是A，而是B replaces A with B. Don't swap them — the meaning flips.
不是...就是...
Means 'either A or B' — both are possible. 不是A，而是B says A is wrong and B is right. The first lists options; the second issues a correction.
Practice
他 ___ 中国人，而是日本人。
Show answer
不是
这不是钱的问题， ___ 信任的问题。
Show answer
而是
Put in order: [而是 / 是 / 这 / 不 / 进步 / 退步]
Show answer
这不是进步，而是退步。
Translate to Chinese: 'She isn't lazy — she's just tired.'
Show answer
她不是懒，而是累了。
Write one sentence correcting a misconception about yourself or something you care about, using 不是...而是....
Show answer
Example answer: 学中文不是为了考试，而是为了和朋友交流。 (I'm not studying Chinese for exams — I'm studying so I can talk with friends.)
Hear It in Real Episodes
This pattern appears in 1 Fluentide episode: