Don't fall---(sleep)

alseep
fall asleep [ˌfɔ:l ə'sli:p]
入睡,睡着
v. 入睡
例句:
He lies down on the sofa and soon fall asleep.
她躺在沙发上很快就睡著了.
He fall asleep over the book.
他看着书睡着了.
Because I am tired, I fall asleep quickly.
因为我很疲劳,因此很快就睡着了.