You may have a schedule that keeps you up a little later

[neb090]

The no-nighttime-eating rule assumes you're going to sleep at a certain time, says Gerbstadt. "You may have a schedule that keeps you up a little later, and if you go to bed hungry, you won't sleep as well."

Source: by Cathy Garrard/ 2013, Fitbie. com.

In this sentence,

Could I use awake instead of up?

 

[5jj]

Yes, but the two words have different meanings.

 

[neb090]

Yes, but the two words have different meanings.

Does up mean the person doesn't lie on the bed and perhaps is still doing other things.

And does awake mean the person lies on the bed, but he can't fall asleep?

 

[5jj]

If you are up, you have not gone to bed. You are probably not even in your bedroom.
If you are awake, you are not sleeping.

 

[Tarheel]

Does up mean the person ISN'T IN bed and perhaps is still doing other things

And does awake mean the person IS IN bed, but he can't fall asleep?

You are awake the whole time you're not asleep.

 

[neb090]

You are awake the whole time you're not asleep.

Does "be in bed" mean "be sleeping?"

 

[5jj]

Not necessarily.

 

[teechar]

Not necessarily. You could be reading a book in bed. I do that every night!
[ cross posted]

 

[Tarheel]

Does "be in bed" mean "be sleeping?"

No, but when we say we're going to bed it's generally understood that it's with the intention of going to sleep.

 

[neb090]

So does "He is in bed." mean "He lies on bed?"

 

[teechar]

"He lies on bed?"

That's unnatural.
"He's in bed" means he's lying on the bed, usually with the intention of sleeping. He may or may not be asleep.

 

[Rover_KE]

To me, when I'm in bed I'm covered (or partially covered) by bedclothes.

 

[tedmc]

You are awake the whole time you're not asleep.

But you are more likely lying in bed than doing something else.

 

[5jj]

I am in bed, asleep, for perhaps eight hours a day.
I am in bed, awake, for perhaps an hour a day.
I am awake for most of the remaining fifteen hours.

 

[Tarheel]

But you are more likely lying in bed than doing something else.

I don't think so.

 

[neb090]

So, both "He is in bed." and "He is lying on the bed." could mean "He is sleeping on the bed." or "Though he is on the bed, but is not necessarily sleeping."

Is that right?

 

[5jj]

Is that right?

No.
"He is in bed" means that he is under the covers. This may be before, during or after sleep.
"He is lying on the bed" means what the words say. He is not under the covers. he may be there for rest, not sleep.

 

[neb090]

No.
"He is in bed" means that he is under the covers. This may be before, during or after sleep.
"He is lying on the bed" means what the words say. He is not under the covers. he may be there for rest, not sleep.

So if I say “He is sleeping in bed.” that exactly means He is sleeping.

Is that right？

 

[5jj]

“He is sleeping in bed.”

I doubt if any native speaker would ever say that.

 

[Tarheel]

So if I say “He is sleeping in bed.” that exactly means He is sleeping.

Is that right？

No, and I don't know what you are getting at. People sleep other places than in bed. "He's sleeping in bed" means exactly that and nothing else.

Abe: What's Jack doing?
Bob: He's in bed, asleep.