我的汉语老师是中国人。

Wǒ de Hànyǔ lǎoshī shì Zhōngguórén.

My Chinese teacher is Chinese.

她是我们的老师。

Tā shì wǒmen de lǎoshī.

She is our teacher.

老师在教我们中文。

Lǎoshī zài jiāo wǒmen Zhōngwén.

The teacher is teaching us Chinese.