妈妈不准我太晚回家。

Māma bù zhǔn wǒ tài wǎn huíjiā.

Mom doesn’t allow me to come home too late.

你明天八点能准时到公司吗？

Nǐ míngtiān bā diǎn néng zhǔnshí dào gōngsī ma?

Can you arrive at the company on time at eight tomorrow?

明天八点开会，你一定要准时来。

Míngtiān bā diǎn kāihuì, nǐ yídìng yào zhǔnshí lái.

The meeting is at eight tomorrow; you must come on time.