不是A而是B
Reach for this when you want to correct an assumption in one move — 'it's not A, it's B.' 不是 throws out the wrong description; 而是 supplies the right one. The construction puts the real point in the second clause, after the misconception has been cleared. Heavy in op-eds, explanations, and any moment when the speaker wants to say 'no, here's what's actually going on.'
Structure
[SUBJECT] 不是 [A]，而是 [B]
bú shì A，ér shì B
How to Think About It
Both halves of the contrast are mandatory. Dropping 而是 turns the correction into two flat statements; dropping 不是 leaves nothing to push against. The 而 is the hinge — it tells the listener 'now flip to what I actually mean.' Native speakers feel the second clause as the load-bearing one; the first is the trash you're taking out.
Examples
这不是借口，而是事实。
Zhè bú shì jièkǒu, ér shì shìshí.
This isn't an excuse — it's a fact.
他不是不会说，而是不想说。
Tā bú shì bú huì shuō, ér shì bù xiǎng shuō.
It's not that he can't speak — he just doesn't want to.
重要的不是结果，而是过程。
Zhòngyào de bú shì jiéguǒ, ér shì guòchéng.
What matters isn't the result — it's the process.
Common Mistake
Learners use 不是A，是B, dropping 而. The sentence becomes grammatically okay but loses the corrective force — it sounds like a list rather than a refutation.
我不是不想，是没时间。
我不是不想，而是没时间。
Don't Confuse With
X 不是 ... 而是 Y
These are the same pattern — just two notations of the same structure. Treat them as one.
不是...就是...
Means 'either A or B' — a forced binary, not a correction. Don't swap with 不是...而是....
不再是...而是...
Add 再 when A used to be true. Plain 不是...而是... implies A was never true.
Practice
我 ___ 生气，___ 担心。
Show answer
不是 / 而是
他不是老师，___ 学生。
Show answer
而是
Arrange: 这 / 一件 / 不是 / 而是 / 衣服 / 礼物
Show answer
这不是一件衣服，而是礼物。
It's not that I don't like it — I just can't afford it.
Show answer
我不是不喜欢，而是买不起。
Use 不是A而是B to correct a wrong impression people have about something you care about.
Show answer
中文不是很难，而是需要时间和耐心。
Hear It in Real Episodes
This pattern appears in 4 Fluentide episodes:
这不是微调，这是重写。
这个决定的分量不是靠措辞衡量的，而是靠数字。
答案不是技术，不是武力，而是耐心、好奇心和善意。
Related Grammar Patterns
Acquire by listening
Hear 不是A而是B in real Chinese, not in a textbook.
Fluentide picks the next news episode at your level, so this pattern shows up again and again in real context. The transcript marks it, the audio drills it. Free to start, no card.