我平常在家里都不戴眼镜的。

Wǒ píngcháng zài jiālǐ dōu bù dài yǎnjìng de.

I normally don't wear glasses at home.

戴眼镜的学生是他的儿子。

Dài yǎnjìng de xuésheng shì tā de érzi.

The student wearing glasses is his son.

我要去买一副眼镜。

Wǒ yào qù mǎi yí fù yǎnjìng.

I'm going to buy a pair of glasses.