You shouldn't play with fire in the forest.

在森林里不能玩火

Children mustn't play with fire.

孩子们不能玩火。

Dont let them play with fire.

别让他们玩火。

Mum told not to play with fire.

妈妈叫我不要玩火。

Let them not play with fire.

别让他们玩火。

I told them not to play with fire.

我告诉他们不要玩火。