学生上体育课时会在操场上跑步。

Xuéshēng shàng tǐyùkè shí huì zài cāochǎng shàng pǎobù.

During PE class, students run on the playground.

学生们在操场上跑步。

Xuéshēngmen zài cāochǎng shàng pǎobù.

The students are running on the playground.

我们在操场上进行体育活动。

Wǒmen zài cāochǎng shàng jìnxíng tǐyù huódòng.

We are engaging in sports activities on the playground.