因为天天跑步，我的球鞋已经旧了。

Yīnwèi tiāntiān pǎobù, wǒde qiúxié yǐjīng jiù le.

Because I run every day, my sneakers are already worn out.

他买了一双新的球鞋准备打篮球。

Tā mǎi le yì shuāng xīn de qiúxié zhǔnbèi dǎ lánqiú.

He bought a new pair of sneakers to play basketball.

这款球鞋不但好看，而且很轻。

Zhè kuǎn qiúxié bùdàn hǎokàn, érqiě hěn qīng.

This style of sneakers is not only good-looking but also very light.