他有一个中国女朋友。

Tā yǒu yí gè Zhōngguó nǚ péngyou.

He has a Chinese girlfriend.

他没有女朋友。

Tā méiyǒu nǚpéngyou.

He doesn’t have a girlfriend.

我女朋友也会说汉语。

Wǒ nǚpéngyou yě huì shuō Hànyǔ.

My girlfriend can also speak Chinese.