我wǒ想xiǎng去qù，但dàn没méi有yǒu时shí间jiān。

I want to go, but I do not have time.

他tā很hěn聪cōng明ming，但dàn不bù努nǔ力lì。

He is very clever but does not work hard.

贵guì是shì贵guì，但dàn东dōng西xī很hěn好hǎo。

It is expensive, but the thing is very good.

他tā累lèi了liǎo，但dàn仍réng坚jiān持chí。

He is tired, but is still pressing on.

事shì情qíng虽suī小xiǎo，但dàn很hěn重zhòng要yào。

The matter is small, but very important.