It's bedtime. Let's turn off the light.

到就寝时间了。我们关灯吧。

Turn off the light!

把那灯关了！

He puts out his hand to turn off the light.

他伸手去关灯。

Could I turn off the light now?

我现在可以关灯了吗？

Then I will turn off the light.

然后我会把灯关掉。