I woke up and I couldn't 'fall' back 'asleep'. [=I couldn't go to sleep again]
We were still 'half asleep' when we went to school the next morning.
One moment she was 'sound asleep', the next she was wide awake!
(..) And am I then revenged to take him in the purging of his soul... ...when he is fit and seasoned for his passage? No When he is drunk asleep or in his rage, or in the incestuous pleasure of his bed... At gaming, swearing or about some act that has no relish of salvation in it... Then trip him (..)2015 Hamlet