I have to go to sleep.

You should sleep.

We can't sleep because of the noise.

I think I'm gonna go to sleep.

She's faking sleep. That's why she's not snoring.

"If you're tired, why don't you go to sleep?" "Because if I go to sleep now I will wake up too early."

"If you're tired, why don't you go to sleep?" "Because if I go to sleep now I will wake up too early."

Despite the importance of sleep, its purpose is a mystery.

Smith has spent years studying the effects of sleep and sleep loss on memory and learning.

Smith has spent years studying the effects of sleep and sleep loss on memory and learning.

How many hours of sleep do you need?

It would of course be cheaper for you to sleep at our place.

As he sits in the dark, typing away at his computer, he hears the sound of morning birds chirping away and realizes he has been up all night - but the insomniac still refuses to sleep.

Never lose sight of the importance of a beautiful sunrise, or watching your kids sleep, or the smell of rain. It's often the small things that really matter in life.

To be quiet in class is to respect other people's sleep.

During winter I sleep with two blankets.

Bears also tend to sleep more during the day than at night, although in the summer, with twenty-four hours of light, this does not apply.

How long does a bear sleep?

When bears sleep or lie down, their postures depend on whether they want to get rid of heat or conserve it.

The professor's boring lecture put me to sleep.

I'm getting little pimples on my face. I wonder if I've been getting enough sleep lately.

Can I sleep out?

I couldn't sleep well because it was noisy outside.

A good appetite, sound sleep, and regular motions are the three signs of good health.

We must sleep at least eight hours a day.

We are not hypocrites in our sleep.

What with fatigue and lack of sleep, he has fallen ill at last.

What with overwork and lack of sleep, she has lost her health.

Hum baby to sleep.

Sleep and wait for good luck.

We cannot sleep well on summer nights.

I sleep on my side.

You will feel better after a night's sleep.

I wonder whether man could live with only two hours' sleep a night.

He looked refreshed after a good night's sleep.

Left to itself, the baby cried itself to sleep.

I can't sleep well.

Put out the light so that you can get a good sleep.

I was at my best after a good sleep.

I've had a good sleep.

A sound sleep made me feel better.

I'll sleep on it.

Good food and enough sleep are absolutely necessary to good health.

Last night I did not get a wink of sleep.

I had a good sleep last night.

I could hardly get a wink of sleep last night.

In case you sleep, set the alarm.

I want to sleep a little more.

Mary took her beauty sleep before the big party.

I can't sleep at all!

Mulligan says he'll sleep easy until the fight.

The babysitter tried to sing the baby to sleep.

I felt so good as I lazed in the sunshine that I drifted off to sleep.

Why couldn't you sleep last night?

I couldn't get to sleep.

Poor Tom's been trying to get to sleep for three hours now.

It was such a hot night that I could not sleep till midnight.

It was so cold that I couldn't sleep.

People sometimes compare death to sleep.

Turn down the TV a little. I'm trying to go to sleep.

In most cases, car accidents result from lack of sleep.

Sleep off the problem.

It is pleasant to sleep under the tree.

The noise awoke me from my sleep.

The cat likes to sleep beside me.

The baby wept to sleep.

The baby cried itself to sleep.

The baby seemed to be sleeping a sound sleep.

The poet compared death to sleep.

That child fell into a profound sleep.

That child murmured something in his sleep.

The boy soon went to sleep.

The children were so excited after the party that they couldn't sleep.

The cry roused me from my sleep.

My sleep was disturbed by the sound.

The sound roused her from sleep.

The noise disturbed my sleep.

In the meantime, he went to sleep.

Did you sleep well last night, Steve?

Mrs. Jones counts sheep every night to go to sleep.

All Jack does is sleep.

If you sleep for a while, you will feel much better.

But I slept right through the class. Don't you ever sleep through an eight-thirty class?

I can sleep in peace after this.

This medicine will ensure you a good night's sleep.

With this noise, I couldn't sleep a wink.

Now that I have finished this assignment I want to go to sleep, but I have to go to school.

This bed is too hard to sleep in.

Did you have a good sleep?

I feel heaps better after a sound sleep.

A sound sleep made me feel much better.

I had a good night's sleep.

Sound sleep freshened him up.

Sleep tight, Sean.

Cookie turned over in his sleep.

My wife's trying to sleep.

In Canada we sleep in a bed, not on the floor.

If you have a cold, lack of sleep is very bad for you.

The haunted house? I won't be able to sleep at night.

Good night, sleep tight.

Good food and good sleep will cure you of your cold.