If I'm lucky enough for the medicine to work I can get to sleep after 1am but if I don't take it then I can't sleep until about 4am.

It's only when I can't sleep at night that the ticking of the clock becomes loud enough to bother me.

Strong coffee kept her awake all night.

Switch off the light. I can't get to sleep.

Did you sleep well last night, Steve?

Don't you sleep well at night?

Why weren't you able to sleep last night?

"Did you finish your graduation thesis on time?" "Yes. I made it." "You can sleep well today, then." "No. I have a test tomorrow."

She couldn't sleep at all last night.

I couldn't sleep because of the heat.

When I was a child, I could sleep anywhere.

I can't sleep lately.

Tom can't sleep without his teddy bear.

I couldn't sleep at all.

As a kid, I could sleep anywhere.

Good morning. Did you sleep well?

"I couldn't sleep last night because that cat wouldn't shut up with its meowing." "Same. I woke up, too." "And apparently my neighbor couldn't take it anymore either. When he yelled at the cat to shut up, it ran away, but I was so startled I couldn't go back to sleep."

I can't sleep on planes.

I can sleep on the floor.

Did you sleep well yesterday?