I don't know when I fell asleep last night.

我不知道昨晚什么时候睡着的。

youdao

At last I sat down, and notwithstanding my apprehensions, not having closed my eyes during the night, fell asleep, after having eaten a little more of my provisions.

最后我坐下来，还是非常恐惧，一晚上都没有合眼，在吃了一点我的干粮之后就睡着了。

youdao

I fell asleep last night thinking about my predicament.

昨晚带着窘境入梦。

youdao