这把椅子的腿是铁做的，很结实。

Zhè bǎ yǐzi de tuǐ shì tiě zuò de, hěn jiēshi.

The legs of this chair are made of iron, so it is very solid.

他每天坐地铁去上班。

Tā měitiān zuò dìtiě qù shàngbān.

He takes the subway to work every day.

这把椅子是铁做的，很重。

Zhè bǎ yǐzi shì tiě zuò de, hěn zhòng.

This chair is made of iron and is very heavy.