I'm sitting under the tree.

我坐在树下。

The Rajah condescended to seat himself on a rug under the tree.

小王公屈尊坐在树下的毯子上。

As soon as the man in the sack saw him passing under the tree, he cried out, "Good morning!"

那个躺在麻袋里的人一看见他从树下走过，就喊道：“早上好！”

The king became very angry at this, and ordered the gardener to keep watch all night under the tree.

国王变得非常生气，命令园丁整夜在树下看守。

There are some chicks under the tree.

树下有几只小鸡。