Can they play a joke on law?

他们能跟法律开玩笑？

Let me play a joke on them.

我要和他们开个玩笑。

Don't play a joke on your teacher.

不要和你的老师开玩笑。

We all play a joke on him.

我们都开他的玩笑。

Let us play a joke on him.

我们来开他个玩笑。