1、The lights were all on.

　　燈都亮著。

　　2、The TV is always on in their house.

　　他們家的電視總是開著。

　　3、We were without electricity for three hours but it's on again now.

　　我們停電三個小時了，不過現在又來電了。

　　4、There was a war on at the time.

　　當時正值戰爭。

　　5、What's on at the movies?

　　電影院在上演什么片子？