you're still half asleep vs you're not still awake

Some examples from the web:

• you're still half asleep
• There's men down at the docks from dawn waiting to take work and you're still half asleep.
• And likewise early in the morning: if you're still half asleep, your meditation will not be very effective.
• You're still half asleep. I'm awake.
• We dig during first period, while everyone is still half asleep in class.
• I mean, I was still half asleep, so...
• Still half asleep, I try to get up to make coffee. Meanwhile I get a...
• Around 9:30 in the morning, Francesca serves me the usual foamless cappuccino, soon to be joined by Marco who is still half asleep.
• I know, I'm just sorry, I'm still half asleep.
• I was still half asleep. I wasn't you're always right.
• l lay still half asleep when I heard the bells ringing.
• Through poor means which seemed to be a stylistic manifesto, they created a series of experimental films on the wave of the first vanguards, by then still half-asleep in the story of the audiovisual world.
• The militiamen captured Aldo, Guido, and myself, still half asleep. (p. 131)
• You find the best facial expressions on public transport: people still half asleep and kids on the way to school in the morning, and the tired faces of those going home after work in the evening.
• Still half asleep Ulisse had asked "Who is it?" and on the other side of the door: "I'm nanna, Ulisse, I've just come to see you".
• More and more of you are waking up, though some, still half-asleep, stagger across the deck as they watch the tempestuous storm of their world changing before them. The Controllers know that many of you are waking up-too many for their comfort.
• So I'm saying you're still half a step off.
• Sleep paralysis is like this, you are half asleep and half awake essentially, so your brain still can sum up some pretty evil, scary, hallucinations, because your first thought is that of panic.
• The degree of sedation may vary from a light calming effect to a condition of being half asleep. In contrast to narcosis (general anaesthesia), a certain degree of consciousness still remains, as well as spontaneous breathing and protective reflexes.
• A writing exercise, half asleep...
• The dragonflies are flying around half asleep.

Some examples from the web:

• you're not still awake
• Look at you, still awake and caring how it went.
• There's plenty of people still awake.
• He's probably still awake if you want to check on him.
• At that time, she's still awake.
• You know, your surrogate daddy's still awake - Screaming in there.
• That's probably why you're still awake.
• They were still awake, playing their game.
• I think your mom's still awake.
• Wonder if you'd be so brave if the boogeyman was still awake.
• When only the vampires and the fouls are still awake.
• The West Coast is still awake.
• His Holiness Dr Athavale was still awake and was writing matter for some Holy texts.
• Just making sure you're still awake.
• He was still awake at 3 o'clock.
• At that time, I was still awake.
• At that time, I was still awake.
• Yes, if they are still awake after the numerous scenes with you and Gabel.
• There's this moment right after it kicks in, and I'm still awake and everything is perfect.
• Rallo, why are you still awake?
• Mom, why are you still awake?