那棵大树被砍下了。

Nà kē dàshù bèi kǎn xià le.

That big tree was cut down.

他在树上砍了一颗椰子下来。

Tā zài shù shàng kǎn le yì kē yēzi xiàlái.

He chopped a coconut down from the tree.

他用斧头砍树。

Tā yòng fǔtóu kǎn shù.

He is chopping down trees with an axe.