So he had been going nonstop for days without sleep.

"Yeah, but these problems are bound to last longer than I can go without sleep."

People who went without sleep too long began to see things that weren't there.

Once he could have gone for three days without sleep.

He who once had been able to go a week without sleep, was ill.

I'm even ready to have an injection given to me so that I can, go for a few days without sleep.

"I will try not to go three days without sleep again."

You have not had to go without sleep for days.

You should know that he can go without sleep for days at a time.

You've got to know how to go without sleep when necessary.