Let's learn about what people are doing.

我们一起来学习一下人们正在做什么。

They are dancing.

他们在跳舞。

He is exercising.

他在锻炼。

He is laughing.

他在笑。

He is falling.

他摔倒了。

Bill is watching TV.

比尔在看电视。

They are walking.

他们在走路。

Justin Bieber is singing.

贾斯丁•比伯在唱歌。

The man is reading.

那个男人在阅读。

The boy is waiting.

那个男孩在等待。

They are sleeping.

他们在睡觉。