我今天下午不用上课。

Wǒ jīntiān xiàwǔ bùyòng shàngkè.

I don't have to go to class this afternoon.

现在是下午五点了。

Xiànzài shì xiàwǔ wǔ diǎn le.

It is 5 in the afternoon right now.

我下午三点回家。

Wǒ xiàwǔ sān diǎn huíjiā.

I go home at three in the afternoon.