Subject：I was out like a light.
迷你对话
A: Wake up! The library is going to be closed. We have to leave for lunch now.
醒醒！图书馆要关门了，我们得去吃午饭了。
B: My God! I was out like a light.
天啊，我睡着了。
地道表达
be out like a light
1. 解释
Like a light的意思与“灯”没有任何关系，其实际意思是“睡着”。而对话中在like a light前面有个副词out，即为：out like a light，其意思就带有“不省人事，昏睡，被击昏”的意思了。
2. 例句
e.g. After the sustained effort of the day I lay down on the bed and went out like a light.
持续不断地苦干了一整天后，我一躺在床上就昏昏入睡了。
e.g. After working a twelve hour shift yesterday, I was out like a light as soon as I got into bed.
昨天经过十二小时轮班工作后，我一躺到床上就睡着了。
