Word: 而是 (érshì)

他不是老师，而是医生。

Tā bú shì lǎoshī, érshì yīshēng.

He is not a teacher but a doctor.

他没有出去，而是坐下了。

Tā méiyǒu chūqù, érshì zuòxiale.

He didn't go out, but instead sat down.

关键不在穿什么，而是怎么穿。

Guānjiàn bú zài chuān shénme, érshì zěnme chuān.

It's not what you wear, it's how you wear it.

地球不是恒星，而是行星。

Dìqiú bú shì héngxīng, érshì xíngxīng.

The earth is not a star, but a planet.

她们不是敌人，而是朋友。

Tāmen bú shì dírén, érshì péngyou.

They are not enemies, but friends.

她没有讲道理，而是诉诸同情。

Tā méiyǒu jiǎngdàolǐ, érshì sùzhū tóngqíng.

She didn't argue with reason, but appealed to sympathy instead.

她爱的不是你，而是我。

Tā ài de bú shì nǐ, érshì wǒ.

It's not you that she loves, it's me.

我要的不是茶，而是咖啡。

Wǒ yào de bú shì chá, érshì kāfēi.

What I want isn't tea, but coffee.

社会不是在进步，而是在退步。

Shèhuì bú shì zài jìnbù, érshì zài tuìbù.

Social conditions are going backward rather than forward.

这不是普通话，而是上海话。

Zhè bú shì pǔtōnghuà, érshì Shànghǎi huà.

This isn't Mandarin, it's Shanghainese.

那不是猪，而是猴子。

Nà bú shì zhū, érshì hóuzi.

It's not a pig; it's a monkey.