他伸手去关灯。

He puts out his hand to turn off the light.

我跟你说了晚上10点之前别关灯的！

I told you not to turn off the light before10pm!

你记得我们出来之前关灯了吗？

Do you remember switching the lights off before we came out?

出门时请随手关灯。

Turn the light off as you go out.; Please switch off the lights when you leave.

出门时随手儿关灯。

Turn the light off as you go out.

他曾再三叮嘱我在离开时一定要先关灯。

He told me once again to be sure to put out the light before leaving.

离开教室时记得关灯。

Remember to turn off the lights when you leave the classroom.

离开房间时记得关灯。

Remember to turn off the lights when you leave the room.

与此同时，如果你在关灯前制定了明天的计划或者读了一个激动人心的故事，那么在你试图入睡之前，就没有足够的时间可以让你放松。

Atthesametime, if you make tomorrow's plan or read an exciting story before turning off the light, it doesn't give you enough time to relax before you try to sleep.