飞机准时起飞。

Fēijī zhǔnshí qǐfēi.

The plane departed on time.

你放心，我会准时到的。

Nǐ fàngxīn, wǒ huì zhǔnshí dào de.

Don't worry, I will arrive on time.

明天记得准时上班。

Míngtiān jìde zhǔnshí shàngbān.

Remember to arrive at work on time tomorrow.